It works great. I use a regular machine, but the wife has the one like the pic I posted. She uses the timer on that thing, but it never starts before I leave home.
The first time I heard that thing go off, I didn't know what had happened. I was working in the room next to the kitchen, and heard that grinder. Scared me - big time.....
At the cost of several wine glasses, I've learned to keep the cat off the counter when I fire the thing off.