I've been here a few times. I've had the Fun-ghi burger, the Lobster Mac and Cheese, and the Asian-themed Kobe beef burger. They were all fantastically crafted with unique flavor so complex that you forget you're eating a burger.
The fries and onion rings are amazing, but the variety of adult milkshakes and 100 beers they offer really make this place a destination.
In the Cosmopolitan Hotel, filled with a dozen $75+ a person dinner restaurants, this place sets itself apart for its laid back atmosphere and great flavor for a more reasonable price (for Vegas, that is)