I recently signed up here because I moved from Maricopa and didn't really want to make that drive every day to go to the gym. The first thing I would tell people is that if you want to sign up here, don't take one of the price options they show you at first. Ask for other options and you'll save about $25 a month and pay a cheaper initiation fee or none at all.
The people at the counter who check you in generally aren't very friendly but they're a very small part of my experience so I deal with it. I just started personal training today and the trainer, Lance, is great! He's friendly and I like his training style (more encouragement than drill instructor). Not to mention I feel like I've been run over by a truck so I forsee good results coming from this.
They have a bunch of different cardio and weight machines and usually have more than one of each so it's not a big deal if someone is on one. They also have a ton of classes that are included in the membership which I think is great. Haven't had a chance to try any out yet but I'm definately going to try to get into one soon.