I got a cat for the first time in my life a year ago. I did a lot of research and decided to try this system. I brought my kitten home at 8 weeks. She had been trained with the other traditional type litter, but had no problem going straight to and using this box. I just got another new kitten and she did the same thing. I'm a neat freak and can't stand bad smells. This pellet system is phenomenal! The only time you smell anything is when there is a fresh poop and they don't bury it or when the pee pad needs to be replaced. I have found its best to wait a little bit to scoop the poop if its fresh. A few pellets might cling and can just get thrown away with the poop.The pee goes right through to the pad and there is zero odor.
One of the best things I found out is that these can be cleaned and re-used!!! I have a big soup pot designated just to cleaning the pellets. I boil them once a month with a little bleach for about 30 minutes, drain and put them in a large bin to dry out. They stay 100% intact and I have reused the same pellets for 3 months. I just keep a backup set of pellets to put in the litter box while the others are being cleaned / dried out and rotate the sets.