Good.  But a little weird.
The Oral B is good value and works well.  No complaints.  It replaces one I had that finally went to that place in the sky where all electronic gizmos eventually go.  The one that died had a single rotating head.  This one has a rotating head and a second head that scrubs up and down.  It's a bit of a mouthful and I'm totally conflicted about which vibrating bit I should be paying attention to.  But it does the job.  And if one wants to use only a rotating head, that works fine.  I'm completely satisfied with this product.
Rating: 4 stars