Any Experience with Motoparty Windshield Extension?

[rpandey]

I am getting hammered by the wind noise - seems like I am just tall enough for the wind to hit the vents on top of my helmet *hard*......
So I am looking at a windscreen extension.
I see a reasonably priced Motoparty Adjustable Windshield Extension Spoiler Windscreen Air Deflector. at Amazon.
Has anyone tried this?
Was the 210mm wide screen a better fit or 280mm?
(Not sure how curved the windscreen is.....).

Any other suggestions on windscreen extensions?
Thanks for any pointers!