OK, so I gave my new e-bike a test ride today.
It's really good. Even before turning on the power, and despite the added weight of the battery (which one can remove if one wants to ride unpowered), it is an easier and faster ride than the last bike I had, which was actually a pretty goood one. Despite being solidly built, it feels like a racing bike.
When you turn on the power, that feels amazing. But that's something I'll need more experience to evaluate properly.
I can really get places fast on this bike. Once I get into better shape, I mean. It's been a while since I really used my thigh- and belly muscles, and had a long hard thing between my legs. What's up with racing saddles? What happened to saddles which actually support your buttocks?
[PS: Do people on bikes not indicate turns in the UK? Every time I did it, somebody waved back at me!)
Update: a reader points to this highly interesting and controversial page about helmets and safety.