good burger. but man, the music they play was so loud I couldn't hear the waiter talk, and she got our order wrong because she couldn't hear us either. Seats on the tables were really uncomfortable. Not sure why Hubert Keller gets such bad seats for his restaurants, as we hated the seats at Fleur as well.
This is on par with LBS Burger at Red Rock and would go here again, when I know it isn't busy. Not worth the hassle when it is busy.
*updating this because I put this in my beer list without mentioning, as 1000000 people already have, that Burger Bar has a pretty noteworthy and awesome beer selection and I always try something when I go here.