Hey
I thought it would hard to get milly to use a hooded litter tray but it really wasnt

I didnt even have to lift the lid up lol I was amazed. But if you find some trouble getting your kitty to go in one heres just an idea to help
Tape the door up and put some dirty litter in the litter tray. Once he starts to regularly use it then you can let the door hang and hopefully he'll get the jist of things lol.
They're great if you remember to change the filters. It really cuts the smell down and (if hes anything like milly) you wont get big piles of litter lying on your floor! lol They're great.