Product arrived with all parts accounted for on a sooner than expected delivery date. Pedal sensor most fiddly part to fit, but still reasonably easy. Adds 4kg with Max battery. Mounting the battery on the handlebars has affected the steering significantly, but it's the simplest place to route all cables. It becomes quite expensive if you choose the seat post option because of the extra cabling required. Have already ordered the brake sensors as my rim brakes are not so effective as other hydraulic ones which is noticeable with more momentum now. Design is good. I recommend. I couldn't get it on the cycle scheme though. Feels like the wind is always behind you or akin to having a child on a tag-along assist. Be careful using any additional speedo. Even level 1 seems to assist beyond the UK legal 15.5 mph where it should be cutting out to human power only.