I love the Superfast upgrade! It’s made so much difference to my Cabin Car. The extra torque is especially noticeable on steep hills. It’s managed them at no less than 8mph, in fact some it even climbs at 12! How many other scooters out there can do that?! The whole experience from first enquiring about the upgrade, placing the order, to the engineer visiting to do the upgrade was completed entirely to my satisfaction. Kevin was great! He explained the whole process, fully checked that I was completely happy with his work and even offered a choice of upgrades, explaining the difference between the two. I have no hesitation whatsoever in recommending Wild & Wacky for their products or service.