I was interested in this product, and thought that if patients suffering from paralysis could keep muscle tone using products with much the same idea behind them, perhaps this might work for my abs. I have a hernia, which has made doing sit-ups or crunches very exciting at times! I was so delighted to feel the abs getting a work-out from the very first use of the Flex Belt! This is my third week of using the Flex Belt, and it WORKS! My belly is flattening out very, very nicely and the Belt is, as advertised, easily used while going about your regular routines. So very worth the money, and I have bought myself 3 additional packs of the pads it uses, as I don't want to be without this product for the few days it takes to ship it to me!