I have done Winsor Pilates and it does take away belly inches. My aunt also did it and got a 6 pack, but she had already lost the belly fat. I think the key with this and any video is consistency and they will all work. You just have to find the one you will keep doing, not just do once and never again
That's my problem, I start to do them for a couple weeks and then get busy and stop. Lately I've been doing Tae Bo and Winsor Pilates, though. I like them both. You just have to make sure you focus on the correct form in order to get the results. It takes me a couple of times to learn the correct way and go the same speed as the video.