My husband and I love going to Burger Bar. There is always a wait, but that's just because it's really good!
On my most recent visit, I tried the buffalo burger on a whole wheat bun, and it was delicious! I've had the Kobe and the black Angus burgers as well, and they are fabulous, too. The skinny fries are always amazing.
My husband always orders the beer sampler-- they have a great selection on tap, and the sampler offers generous portions of any beers you wish to try.
My recommendation is that you get there a little early-- you'll probably have a 30-minute wait at about 6 on a Saturday, but if you get there later, you'll be waiting a while. Oh, and bring a hearty appetite!