My husband and I very much like Club Quarter's in Rockefeller Center. Clean and modern, we have found the service to be very good. We have stayed several times.
Location is good, not the craziness of the Times Square area.

What to avoid at the CQ would be the Terrace room, which I will only call a restaurant because they do.

We had dinner for the first time there a week ago, we waited 45 minutes for our appetizers - when the meal finally came (shrimp scampi) the few shrimp on the plate looked old - and the pasta was just that pasta that looked like it may have been tossed with some butter. It did not smell fresh nor did it look appetizing. I called the waiter back, asked him to take the meal away and take if off my bill. I expressed to the waiter my lack of understanding that well after an hour how could this be the best the kitchen could do???

We ended up going up going out in search of some decent food. We were successful of course after all were in Manhattan, but very put out.

My wife and I needed somewhere to stay in Midtown for our 3rd Anniversary weekend, and after an exhaustive search on TA, AMEX Travel, Hotels.com etc. I picked the CQ in Rockefeller Center. I wanted something that looked fairly new, wasn't outrageously expensive and was close to everything in midtown. CQ hit all of those points easily. The hotel is literally 15 seconds from Radio City and Rockefeller Center by foot, less than 15min to Times Square,
10min to the theater district, close to Grand Central and a doable walk to Central Park. 5th and Park Avenues are about 10mins away as well.

After booking via American Express Travel, I called the hotel and requested an early check-in. (Normally 4pm, we checked in at around 10AM) Check-in was easy via kiosk but there was an attendant close by if we needed her. It lasted all of 5 minutes and we were on our way to our room.

When we got off the elevator the first thing I noticed was that there were only like 6 rooms per floor. As a result it was very quiet the entire time and I never even saw another person on our floor.

Upon entering the room we noticed it was quite small, but new and pretty clean. There were a few dust bunnies roaming around the desk and end tables but it wasn't so bad. The LCD TV was nice and was out of the way of everything else. There was a VGA connection to hook up your laptop to the LCD TV but the front desk said it wasn't operational yet. The room had a decent cordless phone as well as a provided Ethernet cable. Free internet was provided and for you business travelers, VPN worked great.

The bed was nice, trendy, with a duvet. Air conditioning controls were bedside. We did keep getting some weird oder from the bed and I think we narrowed it down to the headboard. It is covered in a satin-like material and I guess with everyone's head grease it started to smell after a while. Not horrible though.

The bathroom was small but clean and the sliding door really didn't do much for sound isolation. No safe in the room so we opted out of maid service and locked our laptops in out luggage. Extra towels and small freebie items are available on every other floor in cabinets by the elevators. There are also fill your own bottled water stations as well by these closets.

No problems sleeping or with noise, W51st on this block is very quiet at night. Room service was decent, not too pricey and you have the option to order to a couple different places outside the hotel and have the food delivered to your door. (and added directly to your bill) FYI the outside Italian place stunk. One club level dining option with limited hours, but we never looked into it as we had all our other meals planned around the city.

Checkout was a breeze. We will be returning here as soon as Christmas
of this year. It's a new hotel that isn't too expensive, has exactly what we need and not much of what we don't.

My wife and I stayed at Club Quarters Rockefeller for 3 nights in August of 07. We had room 1009, which is a comfortable small modern room with a "view" of an adjoining building. The room is equiped with a flat panel TV, fast internet hook up,and an in-room thermasat. The elevators were not operating properly our first night which made getting to and from our room a little challenging. The elevators were fixed the next day so it became a non event but it was quite frustrating having to wait so long.
The self check-in and check-out computers were easy to use and made the process very quick. Club Quarters has free internet access on the seventh floor along with a bar/lounge area with a nice patio that overlooks 51st Street.
The location of the hotel is great ( on 51st Street, between 5th & 6th Ave.) You are within walking distance to Time Square, Grand Central, and Central Park. There are subway stops nearby on 6th ave that got us to further away destinations. We felt that this is a nice low key hotel in a great location and would stay there again.

Club Quarters is located in a perfect place if you want to stay close to Rockefeller, Times Square, etc. The rooms were designed for 1-2 people and they were clean with updated furniture. A flat screen TV was present and the bathroom was nicely updated and decorated. The check in process was painless. This place has a nice workout facility. I'd recommend having a drink on the balcony of the 7th floor restaraunt. Great views and atmosphere. This place is close to everything when staying around Rockefeller. Checkout is automatic and painless. The price was right for this place and I'll stay here again on any future trips.

A few complaints: 1 of the 2 elevators was not working the entire weekend. This made for long waits and the stairs wasn't an option to get to the 23rd floor.
No iron/ironing board.