This system is incredible! I was hoping for slightly better odor control, but it's still much better than any litter. We use one pad a week for two cats, and change the pellets after three weeks or so.
Our cats are 2 and 5 years, we've had them for about three months. Two of those have been using the Breeze system. We switched because I could not stand the litter tracking through the house any longer. Scooping clumps all day long (to keep that 'cat box smell' at bay) was also an issue, as I am a stay at home mom of two, both still in diapers. My day revolved around cleaning pee and poo.
We put the pellets on top of the old litter. Niether cat went number 2 for three days. The next morning was trash pick-up, so I ditched the old box and replaced it with the Breeze. I scooped a bit of the old litter on top of the pellets in the Breeze box to encourage them to use it (the old litter sifted through onto the pad within a day or two. They didn't use it for number 2 for a couple more days, but since then it's been great! I do find a random pellet in places I'd prefer not to (bedrooms!) but our 2 yr-old male cat likes to bat them around when one occasionally gets thrown out of the box. My 1 yr-old likes the sound the pellets make (significantly noisier than clay litter) and tries to use the scoop like a sand shovel if we let her near the box, so we still have to section off the kitchen with a baby gate.
I have added a couple other products for odor control because I have zero tolerance for a smelly cat box. I sprinkle Tidy Cats litter powder on top of the cat pad each week when I put a new one in. My husband forgot to take the garbage out one morning (with a spent cat pad in it) and it surprisingly left no funky smell in the house. The pads work wonders for odor control. The poo has to set in the box for a while to keep it from getting the pellets messy. I've read you're supposed to wait at least 10 minutes. I scoop out any messy pellets along with the poo to help control the odor. My only complaints: the pellets stick to the poo and some have to to be disposed of so I can't flush it like I'd hoped, and the odor from number 2 is a problem. It lingers on the pellets. I was changing the pellets (I use 1 1/2 bags because my cats bury) once a week, and that was getting a bit pricey. I found Citrus Magic (a spray) which works really well for this. I spray the pellets well, and no more poo odor. Our box is unfortunately in the kitchen, but since I've been spraying the pellets, the cat box kind of works like an air freshener- the pellets let off the smell of the spray all day, with no gross odors.
Our local Target sells a bag of pads for about $4.50; the pellets are about $6.50 a bag. The Tidy Cats Powder (also Target) is under $3 and has lasted us two months with a third of the can left, but the Citrus Magic (at Walgreens) is about $5 and lasts us maybe a month.
The Breeze system, with the powder and spray, averages about $23 a month for us, and I scoop once a day with no tracking. We were spending about $38 a month with Tidy Cats clumping litter, Tidy Cats litter powder, and generic box liners. I was scooping 6-7 times a day and there was litter throughout the whole house. The start up for the Breeze did cost us more than we spent to start a clumping litter cat box ($36 for the Breeze, $24 for the normal box set up).
Isn't that the truth!
for urine! I am very pleased not having to sweep up litter all the time. However, for the poop it does not cover the smell at all like litter does. It really stinks 
and you know right away after they have done their business. It needs to be scooped and flushed immediately as it will stink up your entire place. I don't know if they would really use it if we go away for the weekend and there is poop sitting there for a couple of days. I can see them finding other places to go to the bathroom. It is a great concept, but this needs to be worked on. My cats are very particular about things and we will be going away next weekend. We'll see how they do. My husband rates it a 3 out of 5 for the smell factor.
No, I'll just stick to running after & scooping for my cat instead. 
not having litter all over the place!
It's just a normal cat poo smell now. Whew!
