Review (4/5): Great product, however...
...I can't tell the difference as far as the claim that it "directs fluids between teeth" but it does clean my teeth very well.
The only problem I have with these replacement heads is that the color bands don't fit on the base of the brush head like it does on the original so it slides around on the base unit. NOT cool!!
I think they forgot to design in a boss or lip or whatever to hold the color band securely.