Tank isn't large enough to handle the whole job it needs to handle. We use reverse osmosis water in the tank as we have a well. So refilling the tank requires bringing a bottle of water up the second level from the kitchen each night. The lowest setting is painful (and we have nice teeth and gums to start), and the system actually is causing sinus headaches the day after using it. We have quit using it altogether.
No, I would not recommend this to a friend.
Response from waterpik.comBy WaterPik, Product Support, December 28, 2022
Hello AnneMarie - We are sorry that you are not satisfied with the model. It is designed small as it is intended more for those who travel and for those with little counter space. Some users may find it necessary to fill the reservoir more than once. However, we do offer a 30-day money-back guarantee. If you would like more information, you can email us at smreviews@waterpik.com or call (800) 525-2774 for assistance.