I almost switched to the Breeze System. Right when I was going to go out and do it, one of my cats got a UTI. If you've ever had a cat with a UTI, then you know they just start trying to pee everywhere. So instead of the Breeze System, I got more litterboxes to scatter around.

If you do use regular litter, I'd recommend the refillable 40 lb Scoopable litter that's offered at most petstores like PetCo, PetSmart, Pet Supplies Plus. You may like saving a couple dollars buying the 40lb buckets at a warehouse club, but what do you do after a year or so of collecting the buckets I have three refillable buckets that we refil in rotation so we essentially should never run out.

Don't bother with the clay chip stuff, it's literally dirt cheap but makes quite a mess and smell. I don't even know what people do with that stuff, it just gets so nasty when it's urinated on. Turns into mushy clay. SO NASTY!

I'd also not bother with the automatic litter boxes. I've had two in my life and the first one I thought the technology just wasn't right and then got another a few years ago. It still sucked.

Also, I keep the main litterbox in a little pantry in the laundry room. It's tough to smell if you're not in the laundry room. I have a friend that made a mini kind of room in his garage and used a cat door between the hall that goes to the garage for the cat to get into the little cat box room.