Purchased this Waterpik over 6 months ago. Generally, I am happy with the purchase. I particularly liked that there was a travel Waterpik included. Only concern is that the handle will get black yuck inside and it is difficult to clean it out. Two of us use the Waterpik, so the handle gets cleaned after each use. Evidently, water remains inside the handle and then the black gunk (mold?) appears. It does not enter the pik when in use though.
My wife & I both use it . We feel it does a better job of cleaning between our teeth then using floss before we brush . We are in our late 80s & want to keep our teeth a while longer .