At the lamp really nothing there to complain about. However, to me the handlebars was stolen - and with him the lamp holder. There is no single brackets. Thus it has become worthless. And I've just bought an expensive replacement battery, because the original after almost a year no longer wanted to work overnight.
The support is offered individually by BBB, but not for Germany. The search function on the homepage of the manufacturer can be found only distributor in Poland and the Czech Republic.