I have one criticism; it is difficult to maintain clearance of calcium deposits in the machine area of the cordless plus water pick. Other parts come apart for drying & therefore avoiding clogging. I usually have to purchase a unit every two yrs. Best part, convenience.
I would recommend this to a friend!
Response from waterpik.comBy Waterpik, Product Support , May 29, 2018
If you are having issues with water deposits, we do recommend running 2 tablespoons of distilled white vinegar to a full reservoir of water through the unit at least once a month. This will break down any build up.
I'll have to say, at the age of 63, my teeth needed a little more support with cleaning than the ordinary brushing and flossing. So I purchased the WP-450 waterpik. Wow, do my teeth feel good. After about 2 weeks of using it, all the little pains went away. I love this product. P.S.: As soon as my sonic tooth brush wears out. I am going to purchase your waterpik tooth brush.
Needs some improvement. On off switch should be push button. Needs cover on charger plug. Needs light to show its charge. Batt should be replacesable. I hope I get my money's worth before it stops working.