I'll lend my support to Flexible Warrior. I got it for Christmas, and love it! I mostly just do the flexibility part at the end, and really feel good afterwards. It's not fluffy. Plus, I like that they have one person doing the stretches the same way that I do (i.e. they have a non-flexible person helping them demonstrate). There's nothing worse than a yoga DVD where they don't tell you what to do if you can't touch your nose to the bottom of your foot.