Unfortunately, breaking the cables over time the plug. The problem is discussed in various forums. Sigma has a good overall service. After the warranty but is not so funny. Cable break? Buy it new.
Who is not quite clumsy with the soldering iron and heat shrink tubing and hot melt adhesive has, can exchange with the enclosed extension cable the broken plug.
Unfortunately, the handlebar mount breaks very easily. With daily use, a holder holds about 1 year and a little more.
Meanwhile no longer distributed free on service provided warranty expired. It was different times. Why is there still no firmly screwed holder ??? For Powerled Black there were.
When the lamp eventually completely gives up the ghost, I'll look around for an alternative from a different manufacturer. Reliabilty I imagine otherwise. Just when you wake in the dark has to work and is dependent on the light.