It's all well and good to recommend looking over your shoulder, but do you do that every 10-15 seconds (which is about how often I check my mirrors). I just want a clear view of what is behind me, and right now, I don't have that. I have broad shoulders, and both mirrors show my jacket sleeves more than they do what is behind me. Yes, I always look over my shoulders when changing lanes, but otherwise I keep track of what's going on behind me using my mirrors. And I hate those little convex stick-on things. Something better would be greatly appreciated.....