I would never buy or use an e-bike even if it was given to me for free. I cannot imagine the hassles that come with a battery. Constantly having to charge it. I hate just charging my bicycle lights. Not to mention the electricity bill. In addition to this comes issues like repairs, if you fall and break it.
And all of this for what? For some extra power? I don't need extra power. If I did then I would just buy a motorcycle or scooter which are treated the same as bicycles where I live. I like the fact that cycling is simple and all the power comes from inside my own body. An e-bike defeats that purpose.
That being said I do see more and more of them. More people are definately buying them. But I will never be one of them.