I love City Sun because it is so clean, has state-of-the-art equipment, and has great service! Now that I have been there, it is my favorite! There are no appointments, so if you go in the evening it may be busy, depending on which bed you prefer. There is a great waiting area with TV and magazines. Also, there are complimentary water bottles for before or after your tan. The beds are great (my favorite is the S-Class with aromatherapy, mist, and AC). All beds have satellite radio and there are cool, scented towels. Also they leave a peppermint patty as a treat with each session, which is a nice touch to make you feel welcome. I think it's a bit pricey ($19 for a basic tan, but up to $49 depending on the model you choose), but it has superior service and the tanning beds are VERY effective.
Pros: large variety of beds, personal touches, clean
Cons: pricey, busy