The Waterpik is wonderful. I really dislike using string floss, but I promised my dentist I would floss every day. Waterpik uses a soft flow of warm water and rinses between teeth and around the gums gently and thoroughly. It comes with a number of attachments to do a more professional cleaning if you feel like it. My mouth feels cleaner and I have no more guilt feelings about wanting to toss my floss!
I never knew such a device existed until my recent visit to the dentist when I was introduced to it. I have had it for about three weeks and I am very happy with it.