I've been to a lot of indoor play gyms but this is the nicest one yet. Everything is totally spotless and feels new. I also really like that the cafe with seating is in the middle of the play gym so you don't lose sight of your kids. They have wireless internet so in theory you can get some work done and have coffee while your kids play. It's genuis.
My daughter just loves it and the staff is super nice! On weekday mornings it's not super crowded but there are just enough kids to make it interesting for her.
The drop in rate per child is $12 though you can buy punch cards and memberships which lower the rate. No cost for adults (unless you buy coffee or snacks). It would be great if you're visiting San Diego and maybe it's raining outside. It's a socks only place for kids up to 8 years old.