I have a relatively small cat (just over 4 kilograms) and she struggles to fit comfortably in the litter box.

The product is advertised for its ease of cleaning because it has two trays at the base plus a grate. In the end, there is a reason why almost all litter boxes have the classic scoop. The whole process is a bit of a hassle. The litter box with the sand is heavy. If you want to empty the entire contents into a bag, it is easy for it to slip and fill the floor with sand. When you remove the top tray, the base is completely dirty (obviously), so you don't want to place it on your floor. Overall, I regret the purchase and I think a larger one with a simple scoop would be much better.