I am new to the world of Yoga and I have slight scoliosis (abnormal curvature of the spine). While I have no trouble with things like the cobra and cat stretch, I do have trouble sitting up straight - I either hunch forward or arch back when I sit. After trying the video, I can feel an increase in my general flexibility and find myself, throughout the day, reminding myself to sit up straight so my body can better utilize my oxygen and I just plain look better. I look thinner, too, when I don't slouch (slouching allows your stomach to "bunch" or "pooch."). I don't consider this to be a workout, though. I recommend it for either waking up or end-of-the day stretch, right before you curl up with a good book and cup of hot tea. The technicalities of the video - scenery, instructors, shooting angles, etc. - I found to be nondescript and average - which is probably good for a workout DVD. I pay attention to what I'm doing, not wishing I had some Barbie Doll's flat stomach or the cool workout suit she's wearing.