This was a great gym when I first joined but I made the mistake of scheduling classes with a private instructor. My instructor bailed on me after cancelling several appointments. When I complained and tried to get a new instructor, nothing happened. Eventually I ended up calling corporate to explain that I wanted a refund and they refused to refund me. I managed to escalate the issue up the management chain and instead of taking responsibility for failing to provide me with a new instructor, the guy in charge started blaming me for being crazy and violent, which is total nonsense. I finally got my money back but my membership was revoked. The staff at the gym was in total shock because they knew I had done nothing wrong. I since have joined 24-hour fitness and will not look back. Mountainside is a very amateurish outfit.