I do love Burgatory. The milkshakes are great, the burgers are customizable, there are many side options, and the menu is pretty extensive for a burger joint. Also, they have a pretty good happy hour- half off apps and discounted drinks from 4-6pm.
The last time I went though, I was pretty unimpressed. The "pink" bison burger I ordered was very dry, and also, many of the prices went up with the "new menu". I wouldn't advise against going, I would just save it for special occasions and the novelty won't wear off.