It's not a Sonic!
I bought this because my Oral-B Sonic died and I still had some replacement brushes left.  It's no better than a plain old electric toothbrush (for double the price).  A waste of money.[[ASIN:B002BJCC7W Oral-B Vitality Sonic S12513 Rechargeable Power Toothbrush]]
Rating: 2 stars