Jillian's is hard to put a finger on because it's so many things. Upscale arcade and bowling, dance club, bar, pool hall and a couple different restaurants.
For the purpose of my review, I'm going to focus on the arcade. I'm a skee-ball fiend and it has some premium lanes. The whole arcade is very clean and well maintained. It can be pretty crowded with families of kids but you have to remind yourself that you are on their turf.
The downside is that Jillian's uses one of those "credit card" point systems that makes it a little harder to keep track of how much you are actually spending on games. What ever happened to the honest 1 quarter to 1 token ratio?!