My sister in law had great results with the 30 day shred. She has 2 kids and was struggling to get the last of the baby weight off, so she started this workout. She is so fit now because after the 30 day shred, she has done most, if not all, of the other DVD workouts that Jillian Michaels offers and now she's doing P90X! All because this workout gave her the push she needed to get back into working out again and living a healthy lifestyle. I will say though, it's definitely a personal thing, everyone is different, so if you try this workout, don't base your success off of somebody else's because it might not be the same for you.