This little attachmnent to my toilet is amazing.  The hook-up is easy and the package contains all I needed to hook it up.  If you want, watch the short video.  (Don't overtighten the fittings).  The operation is simple.  Center is off.  Twist right for rear, left for front.  I have another bidet on another existing toilet for a very low cost.  I have three toilets.  The first two have Bio Bidet Elite 3's and my last one has this Bio Bidet Slim Edge.  All are wonderful and the first two have never given me any trouble after over 2 years.  So, I wanted to try the Slim Edge because it seemed even simpler to operate and had even a lower price tag.  The slim control arm extends further to the front, is more flexible but seems quite resilient.  I'm glad I discoveerd Bio Bidet.  Now I'm spoiled and really miss it when I have to go away from home.