Review (5/5): Good support for a fine product
My wife bought this initially, but couldn't get use to the vibration, so she asked me if I wanted to try it. Having had stains on my teeth for a long time, I thought why not. I was impressed. Gliding the point along the stains, I could see them start to disappear. Apparently, the vibration really does loosen dental calculus. Not only that, but my wife had lost any literature that came with it. So I emailed the company to explain my experience -- that is, to make sure I was using it the right way -- and to ask for instructions. They emailed me a PDF right away, and then mailed me a new unit of my own. Very courteous and responsive support for a very fine product.