4 years and two brushes later
I've owned two of these brushes, after the non-replacable battery in my first sonicare died I found this much cheaper version where you don't have to worry about the batteries dying while on the move. Both brushes have come up with the same problem: the battery cover eventually stops staying on. I've never really had problems with water getting in the battery compartment, but once the cover stops sticking then you can't really use the brush. However, they seem to last as long as the brushes with rechargable batteries and at 1/5 the price I think this is the way to go.
Rating: 4 stars