Took my 8 year-old nephew here this past weekend. He liked it, but I could tell he was disappointed when something was broken or not working properly. This place is kinda in rough shape, with lots of duct tape holding things together. A lot of the machines don't work, and the place is a little dirty. The lone employee at the front desk wasn't terribly friendly and just sat there the entire time. Kids, of course, don't really notice as much as adults do. My nephew had a good time, but a combination of it's poor location and rough shape will prevent me from taking any of my nephews back anytime soon.
I'd say this would be a good option for any child age 5-8. The open gym price was only $5, so it's a pretty good value. If you are looking for something new and have a couples hours to kill, it's a decent option.
I'd probably rate this place closer to a 2.5. My nephew would probably give it 4 stars.