I've only done the cycling and yoga classes here and I love them both. The cycling classes get REALLY warm because of the body heat and small room so get ready to sweat! I recommend drinking lots of water before going to their spinning class. They give you a towel so no need to bring your own. A lot of the girls wear shorts and just a sports bra to the class because it gets so hot. It's kind of like soul cycle where you spin to the beat of the music. I really love that they turn the lights low because it hides the gross face I make when I'm in pain doing the workout. All of the instructors I've had are great, but it's just like any other group fitness class where some are tougher than others.
As for the yoga classes, they have mats there you can use if you don't want to bring your own. It's not a heated class either so you can wear regular yoga clothes but you for sure will sweat if you do Vinyasa! Those workouts are super difficult.
Overall, I really like Fsy. The location is convenient and the facilities are really nice and clean.