Best electric so far.
This is my 4th electric toothbrush, and by far is the best performer.  Had a cheaper version of the Braun model which filled with water with regular use, and subsequently malfunctioned.  Reluctantly, we purchased this brush which is very similar in design.  As of yet, no water has collected inside the toothbrush.  This model is very powerful and does the job it is advertized to do.  We purchased this particular model because it is the only one proven to be more effective than regular brushing in a clinical study.  I agree that the results are consistent with the study, and hope that we do not get more water in the toothbrush (not covered by warranty, FYI)
Rating: 5 stars