I PROMISE this is not sneaky advertising. My indoor cat family of 6 have a lot of smelly litter trays that take hours to clear out. So, I've been considering a sifting system and found this that is the cheapest hooded tray with a sieve layer. Has anyone used this brand? I can't find any reviews and the photos don't show how it fits together. www.lordsandlabradors.co.uk/products/trixie-berto-top-litter-tray-with-separating-system?