I have be use this product for about a month now and I definitely get a decent work out each and every time . I have not make leap and bound as I be still develop form and technique due to the off shoot mechanic of the product . I immediately recognize two fault or area for improvement . the first fault be that my hand slip while use the product because the surface be too smooth . the second fault be that the work out dvd while effective be too short and basic . the product could be improve significantly by add some abrasive texture to the handle and extend the dvd to include a advanced work out or additional exercise .