First of all, their burgers are fine. Although I wasn't impressed with the service the first time I was there. Went with a group of friends during lunch hour and it took the waitress forever to get to us and we weren't served food until about an hour after ordering. Simply unacceptable.
I have since gone back there a few more times when it wasn't at the peak of rush hour and the service was prompt. Overall it's an alright place to get a burger in Oakland if you are into the whole customization thing and tons of options. If you just want a no frills burger with arguably better fries, Five Guys is like a block away.