I had experienced a problem with my old 20 year old toilet and was replaced with a cheap one last year by some plumber a neighbor told me about.
I then did some research and found Doctor Router , Qn Home Stars and also was told to me by a family friend.
I called Doctors Router and I was given options , and I chose the one piece toilet made to last and very durable . No tank means no worries of leaks. Just the toilet itself was $600 plus to install and not worry about it for at least 10 years. Worth every $
It also has a coating that nothing can stain or stick. Simply the best toilet you can buy.
VERY HAPPY WITH THE FAST SERVICE!
Doctor Router highly Recommend!