Was overly exited about receiving this item. Well packaged and clean. The instructions that come with it are vague at best. Was disappointed with my first try. The "contracting" rings are so far apart that I barely felt anything. There is no way to adjust the girth to your size. You can buy a tight fitting sleeve but not sure if that will be any help. I don't have a small shaft by any means but find this machine built for those with at least 1.5 inch diameter shaft. So almost nobody. The interactive content seems to work but you need to pay to be able to get this to work and need to download software and apps to be able to do anything remotely.