Pretty Litter

Has anyone ever used Pretty Litter?? I cannot decide if I like it or not. I’m using something like that with Ursula, but not the Pretty Litter brand because it is so expensive. She had not been acting right for a couple of days and then she was fine. The litter had not changed colors until after that. About a week later the colors were changing with her litter and it said to take her to the vet. She is eating and drinking and not running a fever. Now I’m questioning if that stuff actually works or not. Should I take her to the vet or not. She isn’t acting like she feels bad so why would I take her?? I do have to run by the vet office soon, so I will ask them about it.