Bests & Worsts Reviews from Amazon

There is no perfect bike mirror. My opinion is that a combination of bar-end mirror (like this one) PLUS a helmet/glasses mounted mirror is the ideal setup. Here are my comments on this mirror: PRO: I can see my quads as I pedal. If the light is right, it actually looks like I have some quads. CON: I can see my quads as I pedal. It reminds me that I'm never going to have those massive legs that some guys (and gals) have. PRO: A quick glance downward gives a quick check of the approaching traffic. CON: The mirror is closer to the road than my helmet-mounted mirror, so it's not as easy to pick out vehicles. PRO: A quick glance downward is all it takes. CON: If you are looking down, then you aren't looking ahead. This will probably get better with time. PRO: When riding "in the drops" on a fast downhill, I don't have to crane my neck way up to see the mirror. (Neck issue is the main reason I bought this mirror.) CON: When standing, the mirror isn't useful. But the helmet mirror still works. Other comments: Vibration from the road surface causes the image to shake. (Same thing happens with helmet-mounted.) Contrary to some other reviews, the mirrors I got are slightly convex. Great field of view. After four rides, I'm still tightening the adjusting screw so that the mirror doesn't shift when I hit a bump in the road. Annoying. The two mirrors came in individual boxes that Amazon just wrapped a piece of cardboard around. One of the mounting screws was lost by the time it got here. (Seller was very responsive, but it still took a week to get a replacement screw.) I'm not used to having something at the end of the bar, and just a minor bump with my hip while standing at a traffic stop sometimes moves the mirror.