We lived in Japan for three and a half years and every home and business has bidet's. We decided to purchase one when we moved back to the United States. While in Japan we researched bidet's and decided the Brondell Swash SE400 would work well for us. We ordered it just as soon as we moved into our new home. It is even better than the ones in Japan. We love it and don't understand why every home in America does not have one. The Swash SE400 has exceeded our expectations. And the installation was simple and easy. The only tool I used was a pair of channel locks but only because I want to be sure the hookups were snug (I probably did not need to). My wife is very happy. She loves the heated toilet seat. Also customer service was awesome. We are considering purchasing a RO under the sink water filter system from Brondell. Great company and great products.