I stopped by Chris's house yesterday and took this Rad Bike for a spin. I've never ridden an electric bike before, but the electric assist made an impression on me.
The electric motor only kicks in when I start pedaling, but there is a twist throttle control for manual override. The throttle is super handy when maneuvering in tight spaces. I twisted the throttle and kept my feet sliding on the ground, and quickly turned the bike around in a driveway.
It is a heavy bike, but it didn't feel as heavy when riding it. The gears are turning now about getting an e-bike for my dad.