I took delivery of these mirrors this week.
On the bike, they look pretty nice - cheap plastic, but the shape looks nice.
First ride out, barely got up the road and the left mirror was left swinging when I tried to adjust it.
I contacted seller - and after being told there is a "tool" to fix this - got a little annoyed - I HAVE HEARD OF A SPANNER MATE - IT HAPPENS TO BE WHAT I USED TO TIGHTEN THE MIRROR. DUH!
They have since offered to replace the left mirror and they are sending another one to me. I'll reserve further judgement until I receive the other mirror.
Look, they are cheap. I would rather pay for Rizoma mirrors and get something that is of good quality. Even with the replacement mirror, I think I will be doing this.
Hope I've been of help.