I just returned from a girls weekend at Atlantis. Everyone was so nice about answering my questions I figured it was good to do the same. We went for just three nights. We booked the beach tower ocean view but we were upgraded when we arrived to the Coral Tower. I was never clear as to why as it seemed like the Beach Tower was open, but we went with it :)
Room was great and had a fantastic veiw. 9th floor. Eveyone said it was far from most things but the walk to the main water park was only 10 minutes and it was a very pretty walk. Also, if you just want a pool and the beach they are literally outside your door. We didn't eat much at Atlantis. The first night we went to the Point for dinner. It was just average and typical resort prices. It was kind of dead though so that was a bit disapointing but the view was nice. The next morning we went for a walk down the beach and ended up at the Dune at the One and Only. Fantastic breakfast with an incredible view. For lunch we would eat at the beach bars on the property. Food was kind of awful but the prices were fine (I mean that is what I expected for the resort). We went to Matisse and the Poop Deck for dinner. Matisse was fantastic and the Pooop Deck was very good but the service is not great. The beaches were gorgeous and although the property was a bit run down in places it was still so much fun. It did get really croweded one day (sat btw 12-3) and it was difficult to find a chair with an umbrella but the staff was very helpful with that. In fact, EVERYONE was very nice and helfpul. We really had no issues. Great trip. We expected a Las Vegas environment plopped down in the middle of the Ocean. that is what it was. If you come with those expectations you will enjoy it.
Oh and arrive for your flight home 3 hours in advance. We arrived 2 hours early and almost missed our plan.