Upgraded my Bio-Bidet from the USPS 6800. The legacy system worked so well and Bio-Bidet products are outstanding that it was time to go to a higher model. Clean your rear end better, feel cleaner and no chance of clogging your toilet with a bunch of toilet paper! I would strongly recommend not to use harsh cleaners on your Bio-Bidet as warned. Harsh chemicals will crack your seat, partly why I upgraded.