I have recently started using a take-a-look eyeglass mirror. I ride in NYC and I disagree that it is a distraction. Probably those who think it is a distraction only rode with it once or twice and didn't take the time to get used to it. It's a tool in your safety toolbox--no, it doesn't replace turning your head, but I feel it is beneficial to my awareness. My advice is try it for a week of commuting before you discount it.