Fitting the 2 piece unit together was a problem. The individual rubber grommets/seals would not stay in place long enough to tighten the screws. The seal process needs to be improved. The instructions were weak, and nowhere were we informed we needed to buy a wax ring or suitable substitute. The website made it very clear to buy a new supply line and a new seat. But nothing on the the wax ring/rubber seal. NADA. Unacceptable for selling to a dyi first-timer.