More cleaning power, works great.
Been using it for several weeks now. Really like it. Fits perfectly. The additional set of bristles vibrates too. Feels like a full regular toothbrush on the outside surface of my teeth. I would guess that it probably doubles the cleaning power there, as there is double the bristle area. I use only the round upper bristle section on the inside surfaces of my teeth. It would just be mechanically difficult to get both sets of bristles working on the inside surfaces.But the round portion works just fine there and the lower set of bristles do not get in the way.
Rating: 5 stars