I purchased mime C Line Brompton and really wanted a Electric Brompton but, at the time feel like the Electric Brompton from was too bulky and not worth the extra money and the weight. Than come Version 3 of the Swytch Conversion kits. From the commercial look and sound so promising. Once received the kits. The black RIM was as good as the OEM wheel, All components look very high grade and u can tell from the picture the battery holder look solid. After the first ride, feel like the money well worthed. For the amount I spent on the kit, I was able to keep up with mime wife Flyer Upstreet 2 which cost 2x the money. The biggest plus for this kits is the light weight battery. Both the Air and Max is big plus and if u ride less hilly location the range seem to exceed what advertised. Overall it is well worthed money spented.