Sunroof visors owners... Does it actually lowers the wind noise on highway speeds with open/closed sunroof? Is one brand better than other?

 

yes lower wind noise w/ roof open, oem is generally the best design wise.

also, i am selling my oem one if you decide to go in that direction. it's in the black market w/ pics.

 

I've never really noticed any real wind noise issues (when sunroof is opened all the way) - even at higher speeds.

 

What about the cleaning under it... Does water or snow stays there or it has way to escape?

 

water does not stay under it as driving the car pushes it the other way.

as for snow, if you pack it full of snow and the temperatures are freezing, you would have to manually get it out, I assume.

Never really had a problem with anything getting stuck in there.