I would have given it five stars because it works great, but it is not compatible with the TOTO Aquia IV Washlet Plus toilet.  This bidet will not allow you to conceal the water supply line or the power cord in the toilet.  It does not indicate anywhere in the description that it is not compatible.  If you want to conceal the water and power lines for the bidet in the toilet then do not order this bidet.  You must find one that is compatible with the T40 TOTO Washlet Plus toilets.  The upgraded and more expensive S500 and S550 are the only ones that will allow you to run the water and power supply lines concealed for a neat and clean presentation/appearance.  Again it still works well and has many of the features of the more expensive models.