The sun visor is a good size and unlike all other known to me diaphragms, at least reasonably light-tight (by 3 layers). The build quality is also decent, also no unpleasant odor after unpacking. The suckers were indeed partially deformed by the pressure in the packaging, but work perfectly.
It closes when you turned install (+ the left to the right) almost the entire rear pane of the Golf IV. The usefulness of the often available small square aperture has me so far undeveloped because all around sun can pass seem.
