This tall litter box has really helped us. For some reason, our big (17 lb) cat has this thing about backing her butt up against the litter box when she pees. The urine would go outside of the box and we couldn't figure out why, no matter how much we bleached & cleaned the cat box, our room with the litter box would stink. Finally figured out what was happening. So, we bought this tall litter box and now her butt isn't up high enough for it to leak over! It also helps keep them from kicking excess litter out the back as they scratch around in there. I would recommend it.