Would have been 5 stars but for the lack of after sales service. Product is quality but it was advertised as fitting any bike! Not so! I have a folding Apollo bike and the only place the pick-up censor will fit is on the frame behind the pedal shaft but the adjoing cable wasn't long enough to accommodate it. I therefore had to make a bracket adapted from a drain pipe to mount the censor forward of the pedals shaft. It works but it is in a precarious position and subject to damage from knocks or grounding. My gripe really is with the after sales support. Switch didn't offer any help whatsoever except to say they would put it to their technicians and get back to me! They never did!!! A longer cable would have solved the problem but that suggestion fell on deaf ears!! Shame really because it is a quality product and works very well, amazing power. I just urge you make sure it will fit your bike before committing, after all it's not a cheap purchase.