So we have two Swytch Bikes. they both work exceptionally well and we are very happy. my only complaint is I wish the battery did not have to be mounted on the handle bars. We have the very first version and the battery on the handle bars makes it unsteady on the side stand. so a set of extension cables for the wiring to mount the Battery some where else would be super appreciated. all in all though it is a great product. when you already have your favorite bike but wish it had a little power on the hills the Swytch bike is so easy to assemble and painless this is the answer. I had to deal with customer service a lot on my order with a warranty problem and the people and response was very good.