When choosing my new bike I had many options of motor systems to chose from. I finally settled on the Bosch active line plus. I’ve had the bike now for two weeks and they put on 200 miles. I live in Chicago which is pretty flat. We do have a lot of bridges though. They are not as high as some of the streets in Seattle or San Francisco but they are quite steep. I tested out a bike with the performance line motor system. It was quite powerful but it made a lot of noise. This new Active line plus motor from Bosch is really quiet and pushes me off those bridges quite easily.