this is the best
i had my doubts before trying the product, but was actually pretty happy with it's performance. it is in no way a weight loss device, but i can really feel the tightening of my core muscles and the slimming, more pulled in, look of my abdomen. if you need to lose excess pounds, this product is not for you, but if you are already fairly thin and just need some help toning up then this is a really great product. it really does reach all your core muscles, much more than crunches alone. it helps tighten you up all the way around, stomach, sides and back. the only downside i would say is having to buy the replacement pads, but it's still a better deal than doing endless crunches.