Review (1/5): Makes teeth sensitive. Use a good manual toothbrush.
I bought a 2 pack of Braun electric brushes for me and my wife. After using it for a month I returned it. I usually do not return any item, least a personal item. But within 3 weeks I noticed that my teeth were more sensitive to cold water, etc. I did not want to use or pay for something that actually ruined my teeth. Looks like these brushes erode the enamel. Once eroded the enamel does not build back. Though I used these brushed around 1 year back, my teeth are still sensitive ever since I used them. The 2nd brush was for my wife and she had exactly the same experience as me.
So I would advise stick to your traditional brush. More technology is not always good.