Saw one at a friend's house while in Japan 13 years ago and have been considering one ever since but the prices were so high, I really couldn't justify purchasing one.  But I found this one for under $500 and I jumped on it for the wife's Christmas gift.  With the exception of having to place an electrical outlet next to my toilet, the installation was a breeze.  Don't watch the video, it's confusing and incorrect.  The manual that comes with the product is crystal clear in providing the correct instructions.  Got off to a bumpy start by trying to raise the water temperature using the remote from a location too far from the toilet and even though I thought it was at a high setting according to the display, the heater was actually turned off.  Once I realized that, everything began working as advertised.  The wife is due home from work in just a few minutes and can't wait to play around with all the functions available!  A little patch job required as you can see in the photo.