It works but not alone you have to eat right drink lots of water and also exercise. I do it once and a while but I really don't néed to because I breastfeed and I'm losing weight like crazy I'm even skinnier then I was before I got pregnant. I just know about it bcus I did it when I was a workout addict lol.. it gave me a really nice shape!! Then I got preggo and lost it hah. But I would do it after your 6 weeks postpartum is up.. because your uterus is still very open and pressure on your stomach wouldn't be good.