I have 30 Day Shred, I like it because it's packs a lot into a small amount of time. I definitely feel it! It's also the only workout video that I've done that's really given me a big change in my body. The last time I did it I lost 1 pound, but it was very noticeable to others - I lost 3 inches from my waist alone! I just brought it out again - doing it 3 times a week, and after week 1 my waist is already smaller. Anyways, clearly I love it.
Definitely worth the 10 bucks I paid for it!
-Aimee