It is easy to have the battery on, but not use the assistance until you actually need it. Setup was easy. It may take a little bit to figure out how to use the power assist and your gearing effectively. It did feel like it was going to run away with me once! If you have a touring (mild step through design) Trek you will lose your water bottle cage spot in order to put it inside the frame. I added a pannier rack and put the battery on the back so I could keep my cage. There is enough room in the bag to fit a small air pump and another water bottle. I put tools from the swytch kit in the side panels. It all fits in the top rack bag without expansion. If I could handle the weight, I could put bags on the sides for extra carrying, like picnicking, camping, or running errands. I paid extra for faster delivery, which did not happen. However, when I contacted customer service about it, I did have said fee refunded with no fuss. That was much appreciated.