I bought three of these toilets for my new cabin in the woods, and two more for my home. I have a high water table and needed a low water use solution in both locations due to backups. The water level in the bowl is adjustable up or down with a screw adjustment in the tank.  This will avoid the obvious problems that other reviewers have complained about. 

I changed my old style laundry washing machine and dishwasher to low water use models and also installed these Kiohler toilets. I  have not had any water back up problems since. 

I like the side mounted flush levers. Top mount buttons on other. models preclude use of the top of the tank cover for storage of anything.