Apparently, some people look at the design of the A9 and claim that it can't work properly. And yet, there are many, many of these headsets out there allowing bicycles to be ridden under almost any condition that a bicycle will face and they perform admirably. I have one and my only complaint is that it seems to need adjustment more often than I would like, but what I would like is "never," so maybe it's a personality disorder and I need to see a shrink rather than a bike mechanic. Maybe Brandt could recommend a good one.