Just chiming in to say, be careful w/TidyCats Breeze. I was an early adopter, and the transition over was going great, until I completely removed the traditional litter box. That's when I found out that one of my cats wasn't keen on the transition, and she let me know by marking. Vindictive marking, she'd pee on the grout lines of the tile flooring! Yes, she was fixed as a kitten, didn't matter. I tried everything, and eventually just had to scrap Breeze and go back to the traditional litter box system, but it was too late. She learned that when she was upset, marking was a good way to let me know. I was eventually able to control her w/generic Prozac, but it was a decade plus of routine pilling, and trying to find the right routine that would not keep her high, but would stop her marking. Towards the end, she went into our office, stood on the brand new leather chair we had recently purchased, and proceeded to mark the desk, including the electronics. At that point, I made the difficult decision to put her down. She was older and even the vet suspected that she was starting to have vision issues, but it still broke my heart to have to put her down b/c of the marking.
Another point - since all my cats are/were rescues, we did have a kitty whose Mama died a day after giving birth to the litter, so she and her litter-mates had not been given basic training from mama. She was sweet, but certainly had some spoiled issues from missing that time w/her mom. One of them is learning how to pee properly - she always stood up and hiked up her hind paws, so traditional litter boxes were too low, and she'd pee right over it and onto the walls and floor. For us, a litter box is a huge clear storage tub, which sits in the bathtub of the 2nd bathroom in our house. Works great, if I forget to clean it one day, there's a mountain of clean litter and free space to use, and my biggest boy, 18 lbs of muscle and over 2' long, can comfortably use it when the weather is bad outside. He prefers to use the garden on nice days....