I'm going to start my first class soon, and I'm a little nervous about what to expect. I've taken regular yoga several times in the past and used to be a modern dancer, so I'm not concerned about the movement....but the HEAT! Any tips from those who have tried this before? I know some people rave about it and others say they'll never go back haha! I'd love to know what to expect and what I can do to make it the best experience.