Product review (3 stars): Concept is Great, the product material is miserably poor in term of quality.
We have used these Heartland Dryer Vents for nearly 15+ years now, periodically replacing parts or whole units, painting them will help keep them less brittle, unfortunately they will crack easily with accidental contact from any single type of item, less a 'wind blown leaf'(haven't seen that hit and crack one of these vents yet) Warning even removing the lid can cause the lid to crack, so work it off all around carefully as if it does crack--is about $12 for another lid alone.
Our vent is very exposed to strong winds and we have never lost a lid unless it was a case where after a periodical cleaning, it was not properly replaced, 99% of the time the lid has never blown off. Painting does help fight damage to this plastic from the sun.
Heartland recently has not been very good about reply to contact, unfortunately.
In this day and age of new materials these vents should be able to be made from a material that simply will not crack as easily