Overall delighted with our Swytch bike conversions... they have transformed two good quality mountain bikes, and more recently a third one, and made it a pleasure to cycle around one of really hilly parts of Dorset. And it's great to re-use existing bikes rather than scrap them to buy new electric bikes. But the process was not for the feinthearted.... We ordered 2 Gen 2 conversions, and they took ages and ages to come - months later than expected - and then we found we had to pay import duty... not a good start. And then we found the axles didn't fit in our forks, and had to file the axles. And because we had two units, were, by a process of elimination, able to identify the faulty component in the original kits, and had to wait another week for a replacement. And then I found that the motor wheel didn't quite fit in my forks - it was scraping the inside of the forks - but thankfully my work had a machine shop, where I was able to get some thin washers custom made to give just enough clearance. And then every few months, the handle-bar brackets go intermittent and then die (I don't think they are up to regular long climbs up steep hills on full power) And then one day my forks broke from the strain (not the bike that needed the custom washers), and I had to have new forks fitted. But the Swytch support have been great (until then decided to stop replacing handle-bar bracket free of charge - and now want £78). And we've stopped using max power on steep hills, which seems to be extending the life of the brackets. Hopefully the later versions have the bracket reliability sorted.