Yes, Atlantis is very much like a Vegas resort. Although, I found that the actual casino wasn't quiet as big as some of the casinos in the big Vegas resorts...it's plenty big enough though!
If I were comparing the amenities (and not considering the proximity to the ocean), Atlantis kind of reminds me of Mandalay Bay in Vegas.
When we went in January, the weather was very bad. There were very few people taking cabs at the time and about 50 cab drivers begging to drive us. Needless to say, we negotiated a great price of $3 per person for 5 of us. Also be sure to ensure that the cab driver pays the bridge tolls - negotiate this up front just to be sure. It's only a dollar or two, but the driver may try to charge you if not decided upon up front.