Love the unit. It replaced the same unit that the power pack died a few months after I bought it. The unit works great and WaterPik was VERY helpful in resolving the problem.
Very satisfied with my waterpik this is my second waterpik after the first one decided not to work after about a little over a year. About the only thing that is concerning is the location of the charging plug in, it is always wet there after use and plugging in the plug with electricity is worrisome.
The only reason for 3 stars is the the device is a little awkward in design and not necessarily easy to hold and maneuver . It does do an adequate job. I also got it at a very reasonable price!