Just a warning - 8 minutes doesn't count warm up, stretching, or the time it takes you to get up from the floor and situated to the next exercise (something that I find really annoying and ineffecient!).I have not read Jeorge's book. I got the routine from an excerpt in O! I don't understand why he doesn't pair exercises that are both on the floor or both standing - it's such a pain getting up and down, up and down. Plus, I feel like you lose that whole idea of "no rest". I'm sure I expend more calories to get up an down, but it's all too easy to take a sip of water or just in repositioning yourself.I have been following WW while I have been doing the 8m workout (more like 10-15 for me), and I have not lost one pound. I'll keep doing it, because it's probably better than nothing, but I'm not impressed so far (about 3 weeks).