Electric bikes?

[audi321]

So I was looking at these electric assisted bikes yesterday like this one.

Now they've started to look 'normal' I thought they might be a viable option.

I know the majority of you lot will frown on this sort of thing, but they have a purpose for some people.

Does anyone have any reviews of these things (or a different make). In particular the battery life as you only get a years warranty and they're £310 to get a new one!

Thanks in advance all.