I've had this disc since I started doing yoga a few months ago but finally tried it for the first time - I will definitely be doing it again, it was a great power yoga workout and has a good balance of different kinds of standing, balance, and core poses. All of the warrior poses, half-moon, triangle, side-angle, exhalted/goddess warrior, chair, tree, twists, plank, side plank. The only thing lacking was inversions, which is fine for most folks I think.
What makes this routine challenging isn't just the poses themselves, but the pace. There is very little time given to transitions or rest between poses, which is part of the reason you build up sweat so quickly. I allow myself to pause the DVD and catch my breath in a few places. I am glad I waited to build up some experience with yoga before trying this dvd, because now I am at about the right level for this while still having room to improve or get to the "full" level on some of these poses. (i.e. side plank while holding top leg up into the air - yikes!). I'll be adding into the weekly rotation.
It is definitely produced in the style of a "workout" dvd more so than a "yoga" dvd - lots of slick music, a countdown clock, etc. There is also very minimal attention to things like the breath, when to inhale and exhale. If you're experienced with yoga already you'll know some of these poses already and can fill that gap on your own, but I would not recommend this as a "first yoga dvd" for anyone. Get at least some basic practice under your belt first.