Because my cat suddenly started slippers on his old, open litter box, I wanted something with a roof. He indoors really can pee against the wall, a special grooved version is necessary because otherwise it runs out again. I have here and it works fine. Nothing about it, everything inside, tight! It was also important for me that the measurements are not so excessively large, have very little space in my apartment. The litter box is compared to other smallish but my - now two - Fellnasen it is sufficient. The litter box comes as a semi-kit, therefore, Henkel, folding door, hinges and rubber feet are specially packed and have to be fitted, but works with a single click, no problem. Then had two Billies ordered, unfortunately only later found that the second in the hood has a small jump. So far, no disadvantage is therefore in use but recognizable, even 5 kg cats sports there. Ergo: Man and cat happy. Would we buy again and again.
Have now in July 2014, a second time ordered for my mom the same time! Because urine stone and the many shuffling is every now back in fashion changing, especially as cat litter is used by two Fellnasen. But in the meantime found nothing better and I'm happy to come back to this product :).