I'm also a big fan of the Gaiam Pilates videos. I have 3-5? of them (Beginner, Intermediate, + several more gimicky ones (therabands, rings, body band, etc) I wanted the props, but don't really care for those videos) However I do feel you need to attend at least a few classes with a certified instructor to get anything at all out of the videos. So much of it is about internal feelings and positions that you need someone to help you find what you should be doing. In my mind ideally you'ld be attending a mat group class once a week, and then using the videos 1-3 other days to supplement.