The Bounce Dryer Bar is incredibly convenient. It installs easily on the dryer drum. I have used it for one month, so I don't know how easy it is to replace. Supposedly it will say "replace" when it is time, which I like. It keeps static off my clothes ok, but the scent does not last. It may be that I have too many clothes in the dryer. Overall, it's very convenient and easy to use, but it does not work better (or worse!) than dryer sheets. The price is very good.