Pretty Good, but better than the alternative
I bought this because I inherited my Dad's teeth, and I collect plaque like a tree collects bark.  You really have to be exact with it, but it does work.  I wouldn't use pressure as it would cause damage to the gums, but it does not hurt, and it is effective.  It comes with a mirror, and it's a good thing because you need that and a steady hand.  With a little practice, it gets easier, and you can improve.  Keeping up with the plaque removal can really save your teeth, but it does not replace what the dentist can do, so you should keep up with that too.
Rating: 5 stars