I bought the XL for my 20 lb cat. He likes the front entry. The box looks so cool. I put in the recommended amount of litter and he still managed to kick quite a bit out. So I decrease the amount of litter and bought the mat. It improved things a little. I really like the box but am disappointed that it doesn’t keep the litter inside the box more than it does.
Modkat XL Front-Entry Liners (3-pack)
My cats really enjoy the modkat XL litter box, it is larger and it’s easier for them to stand in the box. However the box is heavy to pick up and it does not use the paper liners which in my opinion are much better than plastic as the bottom of them are already thinning from the cat urine. Otherwise I like the sleek look of the box and my cats love it !