great point - while the motor makes some hills easier, there are still some that are tough to get up. And it's important to be careful with the motor, since it can be damaged if used too much.
I agree that if people drove the speed limit, it would make the road a lot safer. However, I don't think that speed limits are a joke. I think they are there for a reason and should be followed.
I heard the Specialized Turbo Vado SL rides and handles like a regular bike, but with the added power of the motor, it's motor is nearly silent, and provides enough power to make riding up hills a breeze.