Ordered the new clip-on battery kit in April 2022 for Brompton M6L. Supply chain issues meant that the kit didn't arrive until January 2023, although Swytch were pretty good about keeping me updated. Installation trickier than the manual would have you believe (thank you local bike shop :)). Performance since then has been excellent overall, and I can't imagine going back to non-powered riding. Pros: - Reliable (so far!) - Varied power levels (generally use lowest but good to have higher for hills) - AIR battery pack light and portable Cons: - Range not quite as high as advertised. AIR pack claims 15km, though in my experience it's nearer to 10km - Magnetic pick-up can get knocked out of whack, though it's easy enough to reset Generally very happy, though.