Worth $100
I have used sonic type-tooth brushes for nearly 20 years.  Every couple years my expensive Oral B's have died and I've paid another $100 or more for a replacement.  This tooth brush does an amazing job and works as well as the expensive brands.  I like it's lighter weight and smaller head size.  I'll continue buying this brush, if and whenever it dies.  Never again will I buy another $100 tooth brush when this is available.
Rating: 5 stars