I had a water pik for 10 years and it was great, but a little noisy and I had to replace the handle. The new WP-100 is less noisy and the on/off switch on the handle is an improvement over the button on the previous version. I would give the pik a 5 but I’ve already noticed that the tips do not seat in the handle very well. I’ve only had the pik for less than a month and it’s not performing as it should. I’ll probably need a new handle soon!!!
The waterpik is working well. I have had no problems using it. I feel using every day is very important for the health of your gums and teeth. Brushing alone will not remove food between your teeth and gums and really, how many people floss with a string every day? Use the Waterpik!