The basic concept of the Swytch is beautiful. A battery + controller that you simply install on your bike. You simply remove the battery to recharge it - simple. It is perfect if you want to stop for lunch or just recharge at your desk at work as I do on my 30 mile commute. The downside is the technology. It's new and heavy electronic components bouncing on tracks are always going to suffer. There were also assembly errors from the Chinese factory. The upside - swear free cycling into work across the Epsom Downs where my main traffic issues are the awesome racehorses being exercised. All the fun of being a club cyclist without the sweat.