This review is based upon my recent experience with a multi-day visitor pass while in Phoenix for the holidays.
My friend and I received excellent service from Garret S., one of the general managers, who gave us a very reasonable deal for 5 days of gym use. The process of signing up was easy.
The gym itself is large, clean, well-lit, and had a good vibe: the people working out are friendly, and included everyone from little old ladies on the elliptical to tatted dudes maxing out on the bench.