Great location, great and unique space. I would take marks off for the rain and crappy Chicago weather in late May, but not sure that was her fault. We did have fun with the kids splashing through all the puddles and got to use my hydraulic suspension for legit reasons.
I wouldn't recommend it for younger kids, as there's a baby grand piano which is irresistible to 6 year olds and also there are other people in the building who are very tolerant, but I'm sure they didn't sign up for pattering feet of other peoples children :). I'd say 10 year olds and greater.