In principle a great idea. The turn signals are quite bright, only in bright sunshine they are not seen. But for the dark season they already provide for some more (perceived) security. So you can afford to have when turning left on wet cobblestones in the dark both hands on the handlebars (yes, that's not allowed, the hand must go, even if this falls on the nose). In addition, the gumption care in the setting "steady light" for a clearly visible "position light", especially from the side. But these things have a very great weakness: The switch is housed in a barely visible tiny increase in the gums. You can see this increase does not, you have to feel the place with your thumb. That's not wearing gloves definitely. It expresses how stupid rum and receives the turn signal just not activated. I've marked the place with color, which somewhat simplified the matter. Here is a great need for improvement. The fall safety I have already (unintentionally) tried. A 25 km / h crash on pavement has put away the turn, only the metal piece is scratched. Another minus point: Replacing the batteries is armseelig: these are clamped to the board. Here damages are inevitable. In grades: idea: Very good realization: just adequate.