I just switched my helmet mirror onto my new helmet yesterday. I've used handlebar end mirrors and I never liked their limited view. A helmet mirror, by contrast, looks backward wherever you need to look - just move your head. This is by far the biggest plus in my book. Plus, handlebar mirrors can break. My wife's broke on a bicycle tour in France. I still remember the day her bike tipped over right in front of Notre Dame and the mirror shattered. That was it for bar mirrors for me/us. But it's a great memory nonetheless!

I rode with a mirror on my Skid Lid in the late '70's and '80s but then went without for about a decade thereafter. Not that my collegiate teammates would have let me survive riding with a mirror way back when! But then I realized I should resume using a mirror about 20 years ago and "haven't looked back!" (Boy, talk about wrong choice of phrase there!)

A helmet mirror is so convenient and a quick look back is fast and effortless. Sure, there are times when it's angled wrong or my glasses conceal my view. But that's easily corrected. And being attached to my helmet means it's always where I need it when I'm going for a ride. When you're regularly riding four or five bikes, having one mirror on the helmet is the obvious solution for all the bike options. Geeky? Perhaps. But even mountain biking, it's so easy to keep tabs on the kids in back and people wanting to pass. I find it really hard to ride without.