Generally very happy with the Swytch Bike, which I have had for two years. The range of the battery is only 10 miles, if use full-time on its lowest setting, but I tend to only use the battery to assist with hills, strong winds, or both, and so am able to do trips of 20 miles plus, without using the battery. I am now awaiting a new Go battery with a claimed 40 mile range, which will be very useful. Two gripes about Swytch. First, delivery times. Neither with my original kit nor the Go system on order, has the delivery time stated at the time of order been met. Given that the time between order and stated deliver is always several months, one would have thought the logistics could be better organised. Secondly, the instructions for fitting the kit were not as clear as they could have been. I worked out what to do in the end, but only by trial and error. For example, I filed down the forks on the bike to fit the front wheel, before coming across an instruction to file down the bolt on wheel to fit the fork. Overall, good value, but room for improvement in terms of fitting instructions and delivery dates.