LOVE Tumbleweed! Both the park and rec center! I'm here several times a week. They have a lot of classes to offer for both adults and kids. My kids are always signed up for something here. The facility is huge! It is really kept nice and clean. The exercise machines are in great condition. Good variety of fitness classes. Memberships are very reasonably priced. My only gripes are that child care is not included in your membership. You can buy a 20 visit pass for $40 for childcare. And they don't have a pool :( Otherwise, I'm a huge fan!
Keep a close eye on your kids at the park! It's huge and there are lots of kids so you could easily lose them if you're not paying attention.