I'm in fine shape, but I'll never go back from my ebike, simply because pedaling from a dead stop is so easy that it gives me no reason to run stop signs. The assist also means my average speed is closer to my top speed, so getting around town (with two kids on the bike) is just as fast if not faster than a car, once you factor in parking and all the time I don't waste waiting in traffic etc.

I've had both failure modes (fried my motor somehow, rode pedal-only for a week before I could get to warranty service) also (busted my gearset somehow, got around on throttle-only til I scheduled maintenance.) I ride hard, usually pass everyone (with a wide berth, I'll hang back instead of passing rudely.)

If you are replacing your Prius then a few thousand dollars is easy to afford. The shop that built my bike: http://www.splendidcycles.com/