The classes are so fun (and they're all drop-ins and included with your membership)! Zumba with Julianna on Mon/Wed and Hip Hop Cardio with Alivia on Fridays are the most fun. They're challenging in the best way and such a great workout. I only go to classes at X Shadyside so I can't say much for the equipment, but it's a huge place (two stories!) and looks like a great variety of workout equipment that's offered - plus, it's open 24 hours Monday-Thursday.
My ONE thing to note is that it's a bit outdated (although they seem to be doing renovations!) and the windows on street level are always dark so it doesn't always look as welcoming and I used to think it was always closed for weeks when I walked by. But I HIGHLY recommend checking it out and asking for a tour!