Well, our plastic shutters are gray, and you can't push them up... so many arguments are disproved, or at least equal.... I think the only real argument is resistance to hail damage, and if the manufacturer says "4 sqm of windows are a problem" Everything else is sales talk. In response to the original question: If the manufacturer says it's a problem, either take smaller windows or aluminum shutters. In any case, we did not accept the extra cost for roller shutters.