not impressed
These are harder than Sonicare's regular brushes and harder than I prefer.  I noticed no difference in how clean my teeth felt or looked.  I floss regularly and I don't think directing a flow of water can do the same job of removing debris, so for me, directing water between my teeth probably doesn't do much except make it easier to accidentally splatter.  I also missed the inner rows of brushes that the rubber paddles replace and I know I felt the difference.  Unless I see some hard evidence to the contrary, I'll continue to suspect this is just a marketing gimmick.  I'll stick with the regular brushes.
Rating: 2 stars