it seem to work some muscle that be not work before . limited amount of way a person can use it . I find a few more way I could use it that be not on the dvd . I think the price be to high , price of $ 29.95 . it be price the same locally but by buy it from Amazon I save on the shipping and tax and it be deliver to my door . price for it will probably go down after a while . over all I like it . down side be it ` s limit use .