Emg Mirrors Any Good? & Design

Hi all,

Any of you is familiar with these EMG Mirrors sold by www.classicbikeshop.co.uk? Are they any good? Vibration?

https://www.classicbikeshop.co.uk/chrome-clamp-on-round-mirror.html

And the other question is about the design: Is the bar holder on the back of the mirror piece placed centrally or sligtly on the side to allow better mirror adjustment?





Thxs!