My Swytch pro has been a total trial from the moment it was fitted. Ive been a cyclist and competent bike mechanic for 30 years and found the kit a doddle to fit, quick , clean and simple. But that was the end of my enjoyement of this product. For the first few rides it worked well and only occasionally behaved strangely, juddering, unespected loss of power and strange squealing noise from the motor hub. So winter came and went and I started using the bike again but this time the issues became more frequent until the bike was no longer fit or safe to ride. The motor would come and turn off without warning , almost causing a potentially deadly accident whilst crossing a fast busy road which resulted in a car screeching to a hault and sounding its horn at me as the motor had failed to initiate as expected as I tried to cross the junction. After this I sent an email complaining about the issue to swytch and the dreaded email thread began! Swtch sent email after email requesting detailed description and videos of the issue which I patently obliged, and with every email there was a delay of between 4 and 7 days which resulted in the issue not being addressed for several months! After sending me a number of replacement part ( again each time taking over a week to arrive ) the issue still hadnt been fix. Eventually they sent me a new controller and battery pack which fixed the problem for a month or so but then the problem returned. So I purchased a second hand controller from ebay and that fixed the problem almost entirely. So I decided to contact Swytch again and asked to purchase a spare controller for when the current one breaks and leaves me stranded miles from home. Easy right? Not easy at all. First order paid via a link sent to me but then nothing, then more emails asking for more information and address, followed by an email stating they couldn't find my order!? So I opened a dispute with paypal to get my money back and tried again to order a spare controller.....6 weeks later and another 3 or 4 emails they have now said they are out of stock! 2 years nearly of owning a swytch kit and totally regret buying it. So many hours wasted trying to sort out something that should be so simple and in fact should never have been necessary in the first place if the product had been fit for purpose in the first place. Long story short DO NOT BUY A SWYTCH KIT!