I like that this is a natural product. I was worried that clay sand has silica and is not good for my cats' health. It clumps well and there is no smell. Usually I scoop out the soiled sand and replace with a little bit of new sand. About once a month I throw out all the sand and replace with new sand. I dispose of the poo in the toilet, but do not put in the sand in the toilet. Instead I throw it out with the burnable trash.