What makes me personally a bit skeptical - ohnen negative experience - is the built-in battery. Let's see how long the participates. It costs a bit of money but the lamp.
Also on the durability of the rubber for fixing I'm curious. For me it is now not permanently changed u. Used at different widths seatposts (as originally planned originally), which hopefully helps that he keeps at least 3 years, what my expectations for this price is a minimum.
In the case of negative experiences I write more here. Until then, all good!
