I've made with buying this bucket. Not only that he has too little filling properties, but also the refill cartridges cost a fortune without wealth. I have at the same time even the Litter Champ and will likely continue to use this because it gets for the refill for 3 Euro, have a much better quality and odor-neutralizing effect. I now long to test these systems in my cattery and stay with the Litter Champ.