Okay, because you asked.
When the topic of electric toothbrushes comes up there are two big questions that I always get asked.
#1 Do I need one.
#2 Which one is the best.
#1 No. You do not need an electric tooth brush. If you are a diligent brusher then it does not really matter if your tooth brush uses batteries for power or uses you for power. The results can be the same. This is not to say that the results will be the same in the same amount of time. Because they wont. The manual tooth brush will take a little longer but it is capable of doing the same thing.
# 2 This question is like asking which car is the best. Well, a Ferrari is the fastest and looks the best, but a Toyota Camry will do you just fine. The same is true for tooth brushes. There are tooth brushes out there that can run you over $300. They have timers to tell you when to stop. they will talk to you and tell you to switch sides of the mouth. They have pressure sensors to tell you if you are brushing too hard. And they look really cool. However, the electric toothbrushes that cost $10 can do just as much for cleaning your teeth. The whole idea behind cleaning your teeth is just to get the bristles to remove the plaque. Little timers are nice but if you are capable of getting your teeth clean without a timer then what is the point.
So what do I use?
I use an Oral B electric. I like the way it feels when it cleans and it seems to work well for me. My wife uses a Sonicare, and can't stand my Oral B. Conversely I have used her Sonicare and that thing drives me up the wall. So there is a lot to be said here about personal preference.