I have every litter tray ever made in my house lol for my VERY fussy old cat.
She happily used a standard tray and just stopped one day
We moved trays around, changed litter, got a hooded tray, a bigger one, smaller one etc ....
She never ended up using any and I have simply got used to cleaning the bathroom floor every day
It's her favourite spot and no matter how many litter trays I place in the room she goes next to them
Anyway in my search for a litter tray that she will use I tried the plastic storage boxes and have never looked back!!
They are ideal for those that pee up the side on the litter tray, great at keeping the litter contained and have lots of space for big cats!