With 7 cats and one box I change these out every 2-3 days. These are so much easier to deal with then traditionally litter. My only dissatisfaction is sometimes the urine doesn't always stay on the pad.
The pellets make it so much easier to clean the box 2-3 times a day. I change it out monthly and clean the box. The only down fall is the trail of pellets from the box found daily, but it beats the standard litter.
I was hesitant on trying the Tidy cat system because of the expense. I'm glad that I tried it.
I love it you don't have to change the litter all the tim, so really it saves you money.
I have one kitty and my litter lasted a lot more than one month .
I also love the pads this system is great
No more stinky smells. Plus I believe it actually saves me money