Well, for the money, pay a little bit extra and get a TOTO Drake. Much better performance and you can also get a 1.6 gallon per flush model. I recommend if you are going to get a TOTO to pay the extra 40 bucks and get Sanagloss, cleans the bowl a lot better. Also, Kohler's testing standards aren't as high as TOTO's. And last but not least, quality, the quality of TOTO is so good that it is actually made in USA. Also that the TOTO fills A LOT quicker than a Kohler does. I mean Kohler is a good toilet but most people like Terry will recommend TOTO. Here is a side by side comparison of bowl rinse against the Kohler Class 5 and the TOTO Drake. Just remember that the guy might say Cimarron but it's still a class 5 flush. Good luck with your new toilet!