as willow is going to be a house kitty, she will be using the "toilet" inside, i really didnt want an open tray as i live in a small flat and didnt want the smells, but i also didnt like the look of any of the enclosed trays.........until i seen this!!! this was a bit pricey however after reading reviews it seemed worth the £50, 99% odor free. this reminds me of a palace for Willow as it is gold with gold stairs ( i will tell her it is 14k gold ). All my friends and family say im silly for buying this and that Willow wont use it.....i hope she proves her wrong!!!, i have just a standard litter tray on standby just incase!!!