I have on of these mirrors on my bicycle aka "Betty Bike" I have tried other mirrors in the past but there always was so much vibration that they were almost useless. The area where I live, "Mobile County Alabama" there are no paved bike paths or trails of any kind, so your out there competeing with the cars and trucks on the road, so it is absolutely necessary to have a good mirror so you know what is coming up behind you and this mirror the the BEST, There is no vibration so you know what traffic is behind you.
Is this mirror worth the money? Is your life important to you? If you said HELL YES then GET THIS MIRROR.