Another Take-a-Look user here. I absolutely love this mirror and would not ride without it. It attaches to your glasses with wire and is amazingly stable once in place - no moving around or vibration. Once adjusted properly, it sits off to the side and does not block any of my forward vision whatsoever. I don't trust myself to hold my line perfectly straight when looking back over my shoulder, and with the Take-a-Look I don't have to. Adjusted properly, there is NO blind spot, and it's super light. Just an all-round excellent product.

My husband tried it, but his eyes couldn't handle the quick shift from distance to close vision. I don't have that problem.

I tried a helmet-mounted mirror once, but it vibrated a lot and the sticky stuff doesn't last long. It kept falling off my helmet in between rides, so I finally ditched it.

Hope this helps!
Emily