It's interesting how the reviews on the Atlantis are all over the place, and I can see why. The first time we stayed there, several years ago, it was a 5. Last year, I'd have given it a 2. But with all the remodeling work, I'm back up to a 4.
Check-in was quick, no problems. Customer service at the front desk on check-in and check-out was polite and businesslike - not extremelly friendly, but not at all rude either.
We stayed in the conceirge tower, which is a little more expensive but has a couple of amenities like free continental breakfast and free access to the Internet (personally I think the entire hotel should have free access instead of the $9.99 per day they now charge, but I guess they want you in the casino instead).
The public areas of the tower have all been redecorated, and so have the rooms. New furniture, new carpet, a big flat-screen TV in the main room, and a smaller one in the bathroom. Comfey beds, and a great view.
Because of the remodel, the room was missing its towel bar and TP holder (we were told all the remodeled rooms are), but that was no big deal. We also had a problem with the A/C in the room - very noisy - but I called the front desk and they were very nice, and had someone up there within 30 minutes to fix it.
Be forewarned that as of this writing (June, 2008) many parts of the casino and the hotel are being renovated, so some areas are closed off, and there is a little bit of noise and inconvenience here and there. We certainly did not find it to be a major problem.
What was a bit of a problem, however, was the cigarette smoke. The Atlantis has one of the smokiest casinos I've been in, and a little bit of the smoke smell made it all the way up to our room on the 23rd floor. Only you can decide how much of an issue it is for you, but they really do need a better ventilation system.
The Purple Parrot coffee shop has pretty good burgers, and Toucan Charlies has a great buffet (join the hotel's free Club Paradise, use the card when you gamble, and you'll earn free meals - we got several, and didn't drop very much money at all in the casino).
They're definitely headed back in the right direction, and I would certainly stay there again - especially when it's all finished!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.