Yes, their frozen hot chocolate is very good just like everyone else says. I think this is what usually draws most folks into this place. However, be prepared to wait for a very long time to be seated. I had one of their omelettes which was pretty good, definitely good size portions for their food.
Overall though, it's probably not worth what it costs to actually eat a meal here. It's certainly a little on the pricey side. I'd say this is probably a good place to go for dessert, but with so many good buffets and other good food places in Vegas, I'd probably pass on this one next time unless I was going for another frozen hot chocolate. I believe they do have an area near the entrance where you can order things to go, this might be a better option for you if you've got a lot planned for the day in vegas and don't want to wait in line forever.