Omega Paw Regular Improved Roll 'n Clean Self Cleaning Litter Box

i ordered a large, double checked before hitting the final buy button. After receiving, i went to say wait, thats not what i ordered.( my sister has one, so i know what it looked like and the size i ordered) its small. its says regular, but that is small and very flimsy. i have small and larger cats. they stick their bottoms tiwarda the exit. they are peeing and pooping in floor, mussing the box. the idea of roll and clean is a good one. i have an electric one. but price and not knowing how long they can last had me looking for something similar. i paid double what my sister paid for same brand larger ones, which is what i though i was getting. plus the description said reenforced fasteners. this is very flimsy latches. i dont like deal with sendingbthings back, so it may get cleaned up and handed off for chicken nesting box.