This covered litter box is so pretty, plenty large for both my kittens, was very easy to put together, and my kittens used it immediately! They are only three months old now, but will be growing up quickly. I haven’t put the second one together yet, but I will as soon as I rearrange the room I want for it. The charcoal element 145 definitely works to keep odor down. SO happy I chose this style!