Installed today.  It was so nice to work with a faucet that was designed for ease of installation.  I purchase this Biobidet to replace another brand two weeks ago.  That one was so difficult to install and once installed the base would swivel no matter how tight you tightened it.  Wife said that had to go.  The Biobidet installed so easily. It is well engineered.  My wife looks it and now loves the touchless feature.  A happy wife is a happy life. :)