I recently moved to Chicago and have been doing my research on the best clubs in the area, and IS consistently comes out on top in forums and reviews. While I had a good time, the experience just didn't live up my standards of 20+ years in Vegas. The girls are friendly, but not as aggressive as I like (I'm looking to spend big money and hunt for extras, and I like it when the girls hint and try to persuade me to buy a dance with them). My type are spinners, and there were a few who fit the bill that evening, but they seemed passive and didn't look like they'd give a good grind. Looks wise most dancers were a solid 8.
Overall, would recommend if you're looking for an easy evening to just look and relax, but would not recommend if you're looking for a lot of action.