We spent 2 weeks here in the depths of (our) winter and it was almost perfect. The hotel was better than expected (after reading some reviews!) and the staff couldn't have been more helpful and were always ready with an "Ola" and a smile ... from those working on reception, to the cleaners and gardeners.
The room was more than adequate, with 2 double beds and a bath/shower room. The TV had a good selection of channels incuding one showing films. It was cleaned daily, and the mini bar restocked with water and soft drinks.

The grounds were beautifully planted and well paved. We were in an accomodation block near the main buildings, furthest away from the beach yet it was only a few minutes stroll there. The pools were more than big enough never to feel crowded, but the beach was so perfect we only really used the pool to access the pool bar! There is the usual annoyance of the beach towels on the sunbeds in all the prime (shady) spots from early morning but that happens everywhere.

There's great snorkelling off the beach with loads of reef and fish to see without being too far out from the shore.
There are a selection of wee shops along the beach and they try to lure anyone who dares take a walk passed into their shops ... we bought a painting, but found that though we bartered down to 40% of the origianl price, we could have bought the same thing in Bavaro for half that price ... so beware.
There's actually a wee shopping centre along the road which can be accessed from the beach, and it's probably a better deal than the beach shacks.

We ate at the Mexican restaurant and the steakhouse, and while both were ok, we found the menus were quite limited, so ate at the buffet after that. There was a good selection of food, and as quite a picky eater I had no problem finding something every time. The cakes were gorgeous!!!
Breakfast was a feast, with made to order omelettes/eggs, smoothies and fruit galore as well as a large selection of other stuff. One of the buffet restaurants is designated as Dominican, but served more or less the same as the other one, but tended to be less busy.

Overall we had a good holiday, a couple of mini-monsoons came but they soon passed and beach-life resumed. Plenty to do around the hotel if you're so inclined, but it's the perfect place to chill-out and enjoy the sun while everyone back home is shivering!!
We went on trips to the Marinarium (excellent) and shopping in Bavaro with the rep (not worth it).

So, my girlfriend and I ventured off to Punta Cana for our first vacation together. And I must say, Sirenis Cocotal turned out to be the perfect choice for our resort. Here's why:

Upon arival into Punta Cana airport we retrieved our luggage, breezed through customs, and boarded a charter bus all with in 30 mins. The bus honestly was quite comfortable and was equiped with A/C. The ride is true, it is approx 60 mins to the resort on a slightly bumpy road, but there is a guide on the bus with you and he explained to us about the dominican culture, and all the pertinent information we would need to enjoy our trip.

When we arrived to the Sirenis Cocotal we were immediately impressed. While we waited in line, a smiling waitress brought all of us a cocktail to sip on. It was quite tasty after that bus ride:)

Now, this resort is massive!! There are approx 1200 rooms and they are all divided and spread thoughout the land. They are seperated into buildings and are identified by letter. I think it ranged from "A" to "O" or "P" maybe even more. and thats on both sides of the resort. (yes there are two sides to the resort. Tropical side, which are the suites, and Cocotal side, which are the basic rooms. We were in building "D" on the Cocotal side, which was awesome cause it was pretty much smack dab in the middle of everything.

The rooms were very clean and they included a T.V., stocked fridge(no booze), a wall safe, blow dryer, 2 double or 1 king size bed, a balcony, room service, and of course A/C. Unfortunately the wall safe did require a $50 deposit and an $18 non refundable fee. But the fridge was restocked with water and pop everyday absolutely free:)

Now, like I said, the grounds are massive, and it includes all the amenities you would expect from a great resort and then some! There is a casino, pool, spa/gym, tennis courts, 6 or 7 souvenir shops, a theater, a great disco, and we counted 13 bars, and 5 restaurants. Plus, a helicopter pad!

The pool area is amazing, and it is quite large. There is two kiddie size pools, and one giant pool that winds around and between 2 restaurants, and 2 swim up bars. Loungers, tables, and huts are a plenty, so dont worry about not getting a good spot.

If you get sick of the pool, walk 10 seconds and you are on the beautiful prestine beach. Which includes souvenir huts, kayaks, wind surfing, massage huts, and banana boats.

As far as the food goes, it's the dominican so dont expect fine dining. The regular buffet was very good and it included something different every night. The 5 restaurants included are made up of a steak house, italian, japanese, mexican, and mediterranean. The italian was great, and we heard good things about the japanese, but we would not recommend the steak at the steak house, and we really disliked the mediterranean as well.

Food is available 24/7 on this resort at either the lobby or pool side restaurant. While relaxing at the pool, and hunger suddenly strikes you, head in and grab some wicked nachos or an ice cream cone!

I wont go into detail about the excursions available. Because I think its dependent on your tour representitive. Ours was Sunquest and they offered several different excursions. We only opted to go on two: Snorkling with the sharks and stingrays, and a catamaran tour. They were both amazing!!
They provide nighly entertainment at the theater, and usually there was something going on at the pool during the day. The shows were terrific, never boring, and always had a little something for everyones taste such as games, dancing, and comedy.

Now, just to be fair. I should mention some of the things we disliked. Again, the resort is massive. So you could look at it as a bad thing, or a good thing. Because it's so big, be prepared to do a lot of walking. We also didnt like the amount of families there. The sound of kids running around unattended can be a little distracting. But, it is tolerable. We found the Europeans to be a little rude. (no offense to anyone).
We do recommend caution to those thinking about traveling here with kids due to abundance of top-less women on the beach, and the the fact that people can pretty much smoke anywhere they want.

We can offer you some tips to help maximize your enjoyment, and this is all based on our own personal experience, NOT heresay.

TIP EVERYONE!!
-Leave $2 on your bed for the maid, and your room will be spotless everyday, and you'll come back to your room to a very nice surprise.
-Slip the bartenders a buck or two, and you'll never wait to get served.
-If you can, try and schedule your trip from january to april. As there are virtually no mosquitos!
-Dont make any unecessary phone calls home. It is very expensive!
-If you're canadian, convert your money to US $. The exchange rate down there sucks for canadians.

Everyones preferences are different, but if you are common people like us, you'll have a blast! We will be returning annually to this very resort for our anniversary. Thats how much we loved it!

Just got back from Sirenis Hotel All Inclusive and here are my thoughts, keep in mind my husband and I are in our mid 20's and usually travel 5+star.
I booked this trip as a surprise for my husband and I had a lot of pressure finding the right deal/location etc as we have never been to Dominican before, however when I looked at trip advisor and read all the reviews I was pretty confident in booking Sirenis but deep down still not knowing what to expect.
It is true, the hotel is a good hour away from the airport which is a little bumpy but nothing too harsh the only annoying thing is after traveling from vancouver bc (7hr flight) and being a little sleep deprived; dropping people off at other hotels before we reached ours was a little annoying.
Anyways, the grounds are beautiful and well cared for
The lobby is great to hang out, meet people, and drink before going to the disco which was a little cheezy but decently fun.
The shows they put are pretty good and yes PG for children if that is important to you.
The pool was great with plenty lawn chairs and great entertainment daily.
Beach was beautiful with lots of lawn chairs and quite a bit shade as well which others complained about. Volleyball was super fun and its a nice walk down the beach but the locals will harass you to come shop in their little stores.
The Buffet(s) were good with variety every day. We ate at the italian and mexican restaurant and it was really good with a nice change from the buffets however my biggest complaint was reserving the restaurants because you only have from 8am-12noon or 4-6 to make reservations and they get booked up quick so as soon as you arrive set up your reservations for the week. Also another negative is that from 6-7 all restaurants are closed for prep for dinner which isn't a long time but its impossible to get food if you are starving :)
The rooms were average nothing special but clean and I would recommend a safe. We first had a room on the ground floor but it smelled like mould and it showed that there were leaks in the unit so we kindly asked for a new room and we got upgraded to a room with peak-a-boo views of the ocean and pool.
The Internet situation was ok for those with wifi but it is only available in the lobby and you have to get a password from the front desk. The reception employees were awesome and most of the service was great.
Over-all the trip was fun and I was happy when we arrived and saw what I got us into LOL our main concerns are always the cleaniness of the hotel room and over-all hotel and most importantly the beach. Also, we went on a day trip to Catalina Island which you can choose to snorkel or scuba dive and I would recommend this excursion!
Good Luck and Have fun!!

11 of us stayed at the Sirenis in Feburary and we all had a fantastic time. We were somewhat concerned with all the negative comments that were posted about the resort, but found that the property was very nice as were the employees.

We stayed in I block which is closest to the pool and ocean and the rooms were nice. I wouldn't call them deluxe but very nice and the ceiling fan did a nice job of keeping it cool. The domestic beer is also quite good..a nice lager. The coctails were ok. Some were terrible and some were delicious-just depends what you like. The pool bar made anything you wanted and made it strong..a dollar tip helps and your glass will never be empty.

2 negative aspects...the casino is very small with limited slot machines. If you really want to gamble, go to Vegas. The other annoying and disappointing thing is the restaurant reservations. We booked the Japanese through our Apple rep (who was a waste of time and who should be unemployed) and told that our reservation was for 6:30. When all 11 of us showed up, our name was nowhere to be found. Nothing could be done and all the restaurants were full. No openings were available for the next night either....what a crock!

Also, make sure to visit the shops off the property on the edge of the beach. Very nice and hard working people. Roy (walks with a cane) has excellent merchandise and they also run deep sea fishing tours. The Apple rep could not get us a tour through them b/c they were all sold out for the 4 days we were there but the guys on the beach took all of us and we caught 6 fish and actually came in 1.5 hours early. It is also cheaper than the Apple fishing tours (they have to get their cut) and it takes about an hour to get to the dock....we left right from the hotel beach!

The ride from the airport is long but the buffets were pretty good and no one got sick (other than some good sunburns). We got a very good deal and would definitely return again...if the price is right!