Just finished doing Yogalosophy by Mandy Ingber for the second time. I like it a lot, but read a review that blasted it for all sorts of reasons. So I guess it comes down to what you're looking for in a) yoga, and b) a DVD.
While I like the easy conversational style of the instructor, the review thought she babbled.
While I like that she doesn't take herself too seriously (her mantra? I have a great ass!), the review felt she dishonored the spirit of yoga.
While I liked the combination of toning (her word, not mine) and yoga poses, the review thought the DVD was wrong to call itself yoga.
So if you're a yoga purist, this is not the DVD for you. It's $30 plus shipping, so if you're not sure, maybe find some clips on YouTube so you can get a feel for it. But for me? A 30 minute DVD that makes me smile, helps me to stretch and strengthen my muscles seems like a perfect complement to marathon training.