The installation was very easy, in my case, I was even able to use the holder of the old lamp. But besides that, the Assembly should make no problems. In a pinch, a small assembly instructions with corresponding sketches is.
Small disadvantage:
For a new installation, a cable is already pre-assembled with connectors. Beautiful single cable lugs and heat shrink tubing would have been, so that you can take advantage of existing lines. In my case, the 2 wires were placed to the dynamo at the old lamp. So I had no choice: either the cable from the hub dynamo to the lamp neuzuverlegen with the enclosed cable or to buy me 2 terminals including shrink sleeve.. I just got the latter decisiveness cost point. 1.20
This lamp also has daytime running lights, whether one absolutely needed, was once an open question. One drawback, it is certainly not.
However, this model has no light function, but honestly I did not miss.
Conclusion: If you want a good product at a fair price and can do without parking light, here is well served and has a real alternative to the expensive top models!