Product review (5 stars): Wish it was on my house when I first bought it.
This is a great product. It keeps the wind, cold, heat, insects and rodents out of what was once an open hole to the interior of my home. I went to HomeDepot looking for a good solution to a typical builders stock solution to a dryer vent, but didn't find much more than more crap. This is an excellent find. It was shipped quickly and is made of high quality plastic. I installed the same day it came. The only issue was attaching the top screws to the unit. I damaged the top slightly as there is not a lot of room for the drill or screw driver. Also be aware that this is a big vent. It's not tiny, but I believe the size makes sense for functional reasons. It's also not horrible looking, so the size doesn't really bother me. I highly recommend this for someone trying to control temperature and investations.