I have Winsor Pilates DVD set and I LOVE it! My kids will even get on the floor and do it with me.
I really like how it targets strenghtening the 'powerhouse'. After 4 kids in 6 years, my powerhouse is in major need of a jumpstart. lol
The only negative thing I notice it that if I get off track and skip even a few days, it's like starting all over again. But, I guess it would be that way with just about any workout.
I like to alternate the pilates with walking. I try to do one or the other everyday.
If you are looking for cardio... this is NOT it. If you are looking for better posture and overall strength, it's great!