Product review (5 stars): After five years in full sun and high wind, very Heavy Duty!
After five years in full sun and high wind, this unit works great.  No brittleness, no issues!

We had one installed on our brand new home after the contractor installed the standard plastic shutter style vent which broke in 3 months...  I wish I had him replace the others on the house at the same time.  This unit does not come in a white color, so we have to paint it before install on our house. It is still worth it because it works and lasts a long time! In my opinion, this unit is of far higher quality than the one offered by Lambro Industries and others for the same money.