I have 2 Kohler toilets that are problem free after 5 years the quality is unbelievable, I decided to try a less expensive toilet as this one, I had to replace the toilet seat, very cheaply made, the flushing instrument on top is turning green, made out of plastic. I held off on writing a review right away, after owning this toilet for over a year I do not recommend this product. Pay more get Kohler and have it for life.