Because of the weird bowel opening at the bottom of the bowl this toilet cannot be plunged. It took forty minutes, no joke, to unlcog this toilet after it stopped up. I literally got a workout doing it and I suppose the clogged up toilet paper eventually brokedown and allowed the toilet to flush.I called Kohler about this and they said it's a known issue, yet they were not smart enough to fix it. The new Cimarron and similar models have the very same issue. Kohler suggested a special type of plunger which we bought and paid extra money for yet it also could not plunge the toilet. Aside from this whenever anything gets caught on the sides of the bowel, it will not flush because of the way the toilet is designed.We are getting rid of this toilet and I cannot wait to flush this toilet in a dumpster--goodbye Kohler!