I've been using the Waterpik 450 for a few weeks (on a daily basis) now and have enjoyed using it. My teeth feel much cleaner and healthier now. I've also notice improvements in my gums. I would definitely recommend this to anyone and everyone. The only bad thing I can say is that I do have to refill the water chamber often but that's to be expected with a cordless device.
I have had this a month or so and I love it!!! It has made a difference in the health of my gums and it just feels good too!! LOL I will buy another one when it dies.
I have been using Water Pic for several years and, according to my dentist, my gums have improved over time to an outstanding level, especially considering my age as a Sr. citizen and retaining all but my 4 wisdom teeth and one other lost many years ago.
Excellent product, have had both styles and may still get the other one again. This one has the added convenience of being able to take it to work. Always self conscious after lunch break.... do I have food stuck in my teeth?