I have already ordered the 4th litter this brand since the first of my 5 cats have been well received. Especially on one side much higher edge is ideal for corner and half Stehpinkler. To clean the subtly colored loo well. My first copy was given after a few years also a crack, but rather what I attributed to the long-term use. What was really the reason I do not know, because the others have kept very good so far. I also have two Haubenklos that were only accepted when I removed the hoods. For me, of course, as cats outdoors and not in caves do their business. Tip: the sticker, I could quite easily removed by heating up the hair dryer.