I have a Take-A-Look mirror as well. It is unusual wearing it at first, but after a while it becomes second nature. I have forgotten mine at home a couple times and I felt more unaware of my surroundings. Get one, try it out for a couple weeks and if you don't like it, it was only $15. But I think that it has been the best accessory besides my helmet.
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"I'd rather go riding than not." Ron "Cyclenerd"