My husband and I picked up our Waterpiks WP-100's about 3 weeks ago. Been using them daily every since. All it takes is 90 seconds or less and you can all the gunk out of your teeth! I'd say both of our mouths and gums feel healthier and cleaner. Would recommend to anyone who hates manually flossing (which doesn't do the best job) to get a Waterpik!
The Dentist recommended this product -- I have been using it for a month and I love the way my mouth feels -- will see the dentist in another 2 months and I am sure I will have a better check up.