I have a mirror which is mounted on my helment and love it. I rode for many years without a mirror and having to glance over my shoulder to check traffic certainly provided me with some very scarey moments. With the helment mirror there is no more turning around to see what is behind me for all I have to do is glance into my mirror. I will admit it took awhile to get use to it and fine tune its adjustment for the best view behind me. I simply can't image riding without a mirror today. I commute to work 3 days a week and must travel a busy two lane road for much of the trip, the mirror allows me to see what is behind me at all times.

Hope this helps,
M.