I was able to visit Atlantis twice during my extended weekend for Caribana. I can't comment on food, but the space is amazing. The vibe was excellent, everyone was having a good time, drinks were flowing, and nobody got into a fight reminiscent of a NYC borough party.
The staff is accommodating and the bartenders delivered quick service.
There are multiple levels/rooms for different parties to take place simultaneously and I even got locked out for a bit after my curiosity led me outside a back door and up a few flights of stairs to overlook the beautiful view. Ha.