Brompton Kit. The concept is brilliant, and probably a great way to experience electric biking on a larger bike. However, it is flawed with poor quality parts. The motor itself has a significant rolling resistance, I have been in contact with the support team who assure me that this is normal after viewing the video I sent them of the wheel barely freewheeling 2 revolutions (this is after a good running in period). For comparison the Brompton electric motor freewheels the same as a normal wheel. Why worry about the motor resistance, well the battery range is optimistic and with this motor, running out of juice is not something I relish. Their statement of having no drag is misleading! I cycle 6km a day for work, and if I don't charge it every day the battery starts dieing around 10 Km, no where near the 30km range it is supposed to have. This is at moderate speed and level 3 on the assist. My main niggle is the handle bar battery mount, if I dont clean the contacts on a weekly basis, then I get issues with motor sounding like a bag of bolts and loosing power, as it looses one of the drive signals to the motor. To be honest it is a waste on a Brompton as I always use a bag and can easily slip a battery pack into that. The customer service is good, and I have no problems with the company. Would I buy again? No. We have another Brompton to convert, and I have subsequently found other retailers offering conversion kits at a better price. In fact I think we will just order a kit from china and convert it ourselves.