We have already tried various essays such, so far all were wobbly or equal throughout slipped along with child in the toilet. this is finally stable enough that the dreijähige itself "the throne" can (and although our toilet 2cm wider than they should be, according to the product description). The only drawback: although the stickers were attached by us professionally and presumably totally were wrinkle-free, they now have to fold and come off due to the krummern surface. Finally, you have to wash the thing often, the water goes one step further. Nevertheless, full marks (price at that!)