I bought this about a month ago, and have used it daily (at least) since. It's powerful and surprising how much food comes out even after flossing. Really like it -- and my teeth feel great!
I've used the waterpik about four weeks. Love it! I feel like I've just come from the dentist each morning and evening that I use it. I was never a good flossed. Am buying one for each of my children and their families for Christmas.