Filters are a good addition. The fitment on the Flip Litter Box is a little funky and would probably benefit from having a longer wire hanger.
The big issue I found was that my littlest cat found their sudden appearance on the lid of the box Intimidating and started doing his business outside the box. Something to be aware of if your cat is skittish and you didn’t originally purchase the filter with the litter box. Ended up removing them. They weren’t of much use if he’s peeing on the bathroom mat.
nice design. not sure how well it works—haven’t noticed a huge difference—but probably better than nothing!
Easy to install. Keeps odors away. Good product.
I already submitted a review under the name Birdie