My ex had 2 cats and a bunny and they were best friends. Not to the point of snuggling but they loved each other and played all day. I wound up getting 2 of my own and volunteered at the rabbit shelter, here are some tips:

• They WANT a place to go. They'll train YOU where they want a litter box. If you put the box in one corner and they pee in the other, move it there
• It's a different litter box than the cat's and you'll need many more. My rabs had free reign of 6 rooms (no cage) and 3 litter boxes.
• It's much more gross than a cat litter box and requires more frequent cleaning
• Their personalities are as diverse as cats and some care a lot more about cleanliness than others
• They WILL abandon their litter box to mark the perimeter if they feel threatened. Say, introducing a new pet
• Some rabbits will NEVER get along. With other rabbits or cats. Their personalities are as diverse as a cat.

I loved them but bonestly, I don't recommend getting a rabbit unless you've thought hard about all of the downsides...most of which I didn't mention. I've described them before as "more trouble than owning a dog with fewer benefits than owning a cat"

And they are also absolutely not a good pet for 99.9% of kids.