my first bidet and I am getting used to it.  the controls are pretty straight forward and the adjustments for the water and temperature can be set so that you'll get warm water vice cold. the only concern was that the water connection part you get with the unit is made out of metal.  if you have a toilet with connector thread made out of soft plastic, be sure not to cross thread while installing the part required by toto.  
my first unit received had a huge crack on it, however using the online replacement process, eayfair made it very simple to receive a new unit very quicky.  would buy again!