The "shock detection" text takes 7 seconds to arrive, giving it's precise GPS location, which you can also get by texting the device at any time. There is also a "speed alarm text", which tells you if your bike is being moved in a vehicle travelling faster than X mph. The LED light is a small red beam, which you can point at drivers approaching. I decided against enabling any data connections and with texts sent only, it'll cost about £20 a year in topups using a Giffgaff sim. If my bike is wrested away from my hands and the Police are not interested... I'll put on my Batman costume, track the thieves down in their lair, and bash some heads with a steel Batarang to get my bike back. Or I'll steal it back.
Overall, I'm pleased with this device. Here are it's functions and destructions:
The Kwikfold looks great! My Dahon Helios + Bafang is lighter and has more battery capacity, but doesn't fold as small... If you were to choose a bike for travel while working and living in London, what would you choose now?