More stable than imagined, but strong at the mirror edges optical distortions

I have the mirror for several months now in use. He can be dragged properly fixed to the webbing and also not become loose. Also, the ball joint clamps enough that the mirror is not adjusted despite the constant vibrations when driving (contrary to expectations). Negative is the strong optical distortion especially at the edges, so that the large mirror surface is not completely usable. Here the product photo has been so heavily fined - for 1 point deduction.
One little notice: Although we see his child in the mirror, but the child looks through the mirror addition, the windscreen and thus provides road transport and similar (of course with a smaller field of view) as the driver. Our child is it so excited that it eg can not fall asleep before the mirror is not similar with a cap zuhängt. Then the mirror use is of course the driver also nothing more ...