Staff is nice. It's never too crowded, so you can always get on a machine. This is the main selling point for me. It's so nice to get in and out without having to wait for machines.
I have the $20 a month membership. It gives extra perks like guests, 1/2 price water cooler drinks, use of massage chairs, water massage bed, personal trainers, and tanning. It is a great value. :)
The free weights go up to 60 lbs-- this isn't a concern for me, but I figured I would say this because it is a problem for some people.