I've used the HubBub helmet mirror for over 10 years, on day rides, week rides and a cross-country ride. The mirror is better than mirrors mounted on the handlebar or glasses frame. I've given it as a gift to friends, who enjoy it. I don't ride without it.
...just want you to know i’ve been using your helmet mirror for at least a couple of years, and it’s fabulous. wouldn’t consider riding without it.