My cat has had no problems using it
As soon as my cat arrived he has used this litter tray without any problems. He is 4kg and there is plenty of room for him to sit, turnaround and have a good scratch. The tray is lightweight and the handle and catches seem a bit flimsy so I have not carried the tray when full. There is an opening where the door hangs due to the lid not being square on the tray, so odours and litter can get out. However I had the same problem with another brand of covered tray where the door fitted better..