At first glance, great looking product. I appreciate the included adapters. Great additions, The button in the back works well to remove adapters. Unfortunately the positioning of that button causes me to hold the flosser in a way that my fingers accidentally touches the power button. The charger port needs a new location, I think I remember reading in the manual not to get the device wet. That is impossible. Unfortunately regardless if I got it wet on the outside, water would seep out from the charging port from the inside and the port would leak a yellowish color. Water would collect near the bottom where the flask opening flips open and close to insert water. I had to consistently clean that out with a tool because it could get grimy. The speed choices were reasonable. I desired one more speed the was slower than the slowest setting. It would be nice if you could control the pressure as well. The battery life is amazing, lasts a very long time without being charged. The bottom dump ability is convenient. I would probably use that to fill up the device instead of the flask opening. My device stopped work recently. It no longer turns on, and when I put it on the charger the light is green and stays green. My assumption is the battery got water damage from leaking from the inside out.