Everything! I enjoy the way the coaches encourage us. I love the fact that I don't have to think about what part of my body I want to work on because they already have it done for me and it works my whole body instead one area.
What is not to love? All trainers create a competetitive but fun atmosphere. Regardless of your fitness level the trainers continue to push you so you reach a max potential every single class. Most importantly, you will see results. I don't love OTF. I am addicted to it.
It's challenging but doable and the coaches are so supportive. You know you can do it because you are not in alone. Everyone else is getting their butt kicked...I mean...being challenged, and that adds a huge level of "I got this!"