Which one?
I personally despise covered litterboxes.
Odours get trapped in them very quickly, and since litter boxes are generally used for cats and rabbits whom both have strong noses, it can be annoying for your pet.
It can cause respiratory issues as well, and both rabbits and cats have delicate respiratory systems. Espeicially since cats tend to dig in their litter, and bury their poop, it can cause a problem.
Both rabbits and cats need 2 ways out of a covered place. Most Almost all covered litterboxes only have one entrance.
To add on, they're usually shallower than uncovered ones.
I find people usually use these for cats or rabbits saying it gives them a sense of security. If your cat or rabbit is timid and prefers to use the washroom in a covered space, covered litterboxes are still a no-go. Like I said, lack of ventilation and only one exit can cause a problem. DIYing your own cover out of 3 NIC grids/c&c grids is a much better way to provide security, as the ventilation is better. Simply drape a pillowcase on top of the cover and you have a more ventilated cover.
Other people use it saying that it's an eyesore to see a dirty litterbox. If it's dirty, then why isn't it cleaned????? You can just cover the litterbox with a nic grid/c&c grid cover like said.
I prefer uncovered litterboxes 100%.
There's also easy and cheap uncovered ones, such as 100 qt bins (for cats, since they need deep litter to bury their poop) or long, flat under-the-bed storage bins for buns.
