Good price for the 3 pack, and they last more than a year in my household with 2 cats. But I do also gather and throw back the ones I find around the house. My only negative thing to say about the granules is that they appear everywhere. We have a two story house, and I find them in literally every room, upstairs and down. I wish they were a little heavier in weight so that they didn't travel so far, but I understand why they are not.