Wow. After I drove a few months with a rigid, hard adjustable rear-view mirror, the changeover to the gooseneck was a quantum leap. The diameter is so large that you could even see with this convex mirror, if there are planes in the sky at about 7cm. The curvature, the objects are shown, however so small that you could not figure out the airline. This naturally also applies to the vehicles behind: the vehicles appear very small behind me. With a little practice you will find out soon, but how far they are still on a path. I especially appreciate the flexible gooseneck. Even if one comes to the mirror when parking the wheel, he pretends not so fast, singles are a little and springs back again. If the pressure is too great and the mirror pretending, you can bring it to a handle back into position. I could not with the rigid predecessor levels. As had to be re-adjusted and tightened. All in all, I feel very safe with this mirror - strong buy recommendation.