After nearly a year, I have got to say that this is an impressively simple and effective way of going electric with the big bonus that the bicycle theives don't seem to be interested in it. My partner has lost two expensive conventional ebikes from our "safe" lockup in the time. With mine, the battery pack is easily hidden. Care needs to be taken in sizing your battery. I have two: one mini and one max and alternate according to the planned use during the day. I am a light user, perpetually on the P1 setting on our flat and smooth cycleways and quiet backstreets...its a means of getting me up to the legally mandated 27kmh maximum where the system cuts out. Even with heavy shopping loads I never have to envoke higher settings and so have never flattened either battery completely. My pet peeve is that there is no USB-C port for topping up other devices nor blue comms and app with my phone. Both features I would happily pay for.