Love Orange Theory! I've been running a lot lately and decided I wanted to back off of the pavement pounding and get more of a full-body workout. My usual gym does not offer a great variety of classes. So, when a friend asked me to try OT, I was excited. OT did not disappoint! I love that I can see my heartrate - it makes it a lot easier to compete with myself! The classes are always different and that is fantastic. The instructors are energetic and happy to help. I had not used TRX prior to OT and David has taken time to explain a few of the exercises to me. Dan went out of his way to ask me about a race that I ran (I was wearing the free-shirt from the race in class). One hour and done for the day. I love it! I'm going twice a week and I feel great. I still run outside, but I love my OT!