I have been using the pik for about three weeks. It seems to do a good job. The proof will be at my next dentist visit. It is a little loud and a bit messy to use but if it helps it will be worth it!
Once I got the hang of it, I was thrilled at the outcome. This had been recommended by a member of the family who says it is the greatest invention since toothpaste.
I regret not trying this product sooner. I find it so much better for flossing, something I rarely did before, but now enjoy twice a day. The unit is excellent in all regards and I'd replace it with another if mine wears out.