After a lengthy Covid-induced wait, got my Swytch conversion fitted to my Brompton in about an hour or so. The only bit that takes real care and improvisation as all bikes seem to differ is the fitting of the Power Assistance Sensor to the bike's pedal crank and the nearest bit of frame. The rest is more of a 'bolt it on and wire it together' affair. Even the connectors can't be mixed up. The only niggle I had was that with the battery box in place at handlebar level, my wireless speedo stopped working - OK it's only a Halfords basic job but I'm not alone and some other users have more exotic 'computers'. It now works fine down on the crossbar out of the line of fire of what I assume is radio interference. Riding an assisted bike for the first time makes you smile - you can't help it. It will only assist whilst you're pedalling so you can't cheat and use it like a moped - well not on the UK's roads you can't although other countries allow for a throttle to be fitted. You can here too as long as you stay off road, although this is not that likely with a Brompton! As you'll see from my MapMyRun stats below, it has helped me tackle a short and very steep 800' climb that I couldn't even complete on my mountain bike. I had to use level 5 on the power pack (it's the smaller Eco version) and used up 40% of the battery, but as you can imagine, I didn't use ANY on the way back! Glad I waited - you bet!