Great toilet. My plumber took a few extra minutes figuring out how to install it, but it went in fine. I love the dual flush. By holding the button, it seems like you can increase the flushing time. This model needs a little extra help with the toilet brush, even after the longer flush, but if you don't mind that, it's a fine option for families who want to conserve water.
my plumber friend told me these would work with the US standard sanitary serwer slope. He was totally wrong. My water conusmption is 1/3 of my neighbor's.