Lots of different styles of trainers, which is fantastic, I have worked with 4 different ones, and they each bring something different to the table. Also, not needing to deal with bringing my own towel is a fantastic touch!
I love the challenging classes! I have been too many gyms and find the classes at Kalev fitness to be the best combination of cardio and strength training. Also love the creative exercises. They are always mixing things up so you don't get bored.