I was an initial investor in the very first Swytch set and also have a second more modern set with the smaller battery. One is now on a hybrid style bike and the newer one, on one of my Bromptons. Overall I am happy, hence buying two sets. But the drive from the pedals is very unreliable to the point that I have now removed them from both bikes and just use the thumb drive, this actually makes the bikes illegal in the UK which is not ideal. The wait after ordering is ridiculous and the customer communications from Swytch is terrible. However, if you don't mind using the thumb drive and can get hold of a working set they are a joy to use and the battery lasts well.