Yeah, we had the same problems with others... The first one was a mat that we put in Boris' crate, until he made a hole in it and the foam started getting out. Now it's over the crate and the cats sleep on it. The other two were some kind of big baskets, but it was mostly a cover over some polyester material, so it didn't take long for Tips to find out how fun that stuff is fun to rip off, and he peed on the other just after we got him, so they are put away for now...
I had to put some bitter apple on the new one this morning, I just hope it will actually last a while...