Great!
I bought one of these. My teeth are not badly stained and I brush & floss regularly, but I had an annoying little build up of tartar in a tiny gap between two crowded teeth, which was easy to shift with this descaler. I’m now using it on my dog’s tartar with excellent results, although he doesn’t enjoy the noise it makes. Hopefully I won’t need to use it often if I keep up with his emmipet brushing. (Obviously I will be buying myself a new one, I love my dog, but not enough to share his dental equipment!)