Well that's annoying
Where is the off button?  It is easy to fill, charges relatively quickly and works with water or mouthwash.  But there is no way to turn it off so it runs even after the water is gone.  It is portable, so you can use it in the shower which is not a bad idea since you can't turn it off to set it down for a minute.  I'll stick with my Waterpic.
Rating: 3 stars