Review (5/5): I really like this toothbrush and will buy it again if my current one breaks.
I have the water problem like many people said, but the design of this toothbrush kinda makes it so that even with water inside, it will be functional as the moving parts are controlled by a magnet instead of a direct motor. Its hard to explain, but when water gets in it, I am not worried too much because it seems separated from each other still.
Its been several months and my teeth have never felt cleaner, I came from an Oral B toothbrush and I like this one much better as I feel the quality is much higher but at great cost to the battery life (which to me is acceptable as I buy AA batteries all of the time)