I know that quite a few of you have electric assisted bicycles. I think it's time I got one of these, and would appreciate the benefit of your experience and knowledge in this matter.

I'd aim to use it most days for the commute to and from work (so a commuter bike) unless I need to cart stuff about or the weather is bad. It's not far, only about 2.5 miles, but there is a ferocious hill to climb both directions (valley in the middle; very badly designed topography).

What should I be looking for/seeking to avoid ?

Giles. Mogless in Paris.