This gym is OK. The price is right (~20/month) after an initial setup fee, but if you are going anytime in the post-work rush it will be uncomfortably crowded. If you use free weights like I do, you should plan on a wait period, even if you decide to work in. There are a lot of real serious guys that you use those weights and they often occupy more than one at a time. Be forewarned.
Back in January, when they lowered the prices and people were doing the New Years Resolution thing, this place was unbearable... to the point of no lockers even being available. It is more bearable now.
If you won't be going during the post-work rush and will be in the market square area, this place is a good option.