Opinions on "pedal assisted" bikes

I haven't ridden in years. I have a bad-ish back and live in an extremely hilly area. I'd like to be able to ride with my grandson comfortably (including some light trails). I've seen a fair number of these around but don't know what to think.

Do I need at least some forked suspension?

Are they all absurdly heavy compared to "regular" bikes?

Are the batteries decent?

etc.

TIA!