I had never used before a small mirror like this, however, it took me 1 minute getting used to it. Believe me, there's no better way to look behind you. The closeness of the mirror to your eye gives an incredibly big picture of things behind. By the way, one mirror is enough to look both to your left and right rears. 5 stars

This mirror is great! It is easy to attach to glasses and is very durable. As it is somewhat larger than other mirrors it provides a very good field of view. It was very easy to get used to and now I wouldn't ride in traffic without it. One turn of the head and I can scan everything behind me - much more confidently than turning my head.

The mirror is VERY durable. It fell out of my pocket while attached to sunglasses and was run over by a car. The glasses were ruined and the mirror was unscathed and I'm using it a year later.
5 stars

This is our second set of eyeglass mirrors. They are easy to use and once you get used to using them you don't want to go anywhere without them. I even find myself checking my "mirror" when I'm walking and don't have it on. One drawback that we've found is that if your frames are flimsy they could get bent. But that hasn't really been an issue for us.

Give these easy to use mirrors a try. I won't ride without one. 4 stars

I purchased this after using a friends and it is fantastic! The quality is second to none. It attaches to you glasses easily and stays put. It is easy to adjust in just about any direction. I would highly recommend to anyone looking for a rearview mirrow for biking. 5 stars

The mirror and its attachment is better than the ones I have purchased, however, the attachment does not addapt to all helmets. I have two helmets by Specialized: one I had no problem attaching to, the other, the helmet bindings were in the way and could not get the mirror attachment to fit properly. It would be to your advantage to research and design the mirror attachment to fit all helmets. This would help the buyer from purchasing a new helmet just to fit the mirror attachment. Whether or not you print this review does not matter to me. This review is intended for your design department. Thanks for the mirror. 4 stars