I recently switched from Greenies after reading some pretty scary stuff about them. One of my best friends, who also has a Cockapoo (I have two), told me about these a while back, but it took me a while to try them out.I like the fact they're made from natural ingredients. My dogs really like them, too. Well, at least one of them does; the girl is finicky and only eats maybe half of it, and the boy finishes it off for her. I like the fact it takes them a while to eat, unlike the Greenies, which they both gobbled down in a couple of bites.Note: In my opinion, these "small" toothbrushes are just right size for my dogs (19 lbs and 31 lbs); they're Cockapoos, so they have relatively small teeth. This size is actually slightly larger than the "petite" Greenies.This economy sized box is quite economical: it comes out to $0.43 per toothbrush, which is cheaper than the $0.53 each I was paying for Greenies.I can't give an opinion on the actual tooth cleaning yet, since I just started giving these to my dogs a few weeks ago.