I selected this toilet because it is a trusted brand and I selected one with the Classic five flush because it is supposed to have a stronger flush. This is the only toilet I have ever had that is worthless to me and I am sorry I put it in. It flushed ok twice when the Handiman installed it. When I went to flush it later that day it sort of coughed up about a quart of water and just sat there. I flushed it again and it ran over. I have had to manually remove all of the water in it.  Then it flushed for about a week or so if I only use it for urine. While I have had it flush a normal stool about twice, its usual behavior is to fill up with water and just sit there for hours. Then I have to remove contents again and we are back to go.  It is tight, it does not nnu leak,