Mirrycle yesterday. I had my other one for 15 yrs, but only started using it when I got my new bike a year and a half ago. Now I can't bike without one. I am surprised that they still sell them after all these years, it's identical to the one I originally bought many moons ago. They aren't too expensive, I got mine for almost $20, although I've seen them for sale online for as little as $13 US.
One of the screws got stripped, the mirror loosens and you have to tighten it up once in a while, and eventually it tightens no more. :( This is quite common, apparently.
So I bought another one as I like the the way it can be adjusted by the pivot points. I think one of the better bike mirrors around. No vibration! How many out there use a mirror and can't live without it? What is your favourite mirror? Do you prefer ones that fit on helmet, or ones that go on bike?