Product review (3 stars): a bit disappointing
Bought the vent cover because we had birds flying in and out of old vent.  This vent prevents birds from entering, but the outer frame cover does not sit flush against the wall, so I had to caulk all the way around the unit and it looks like it is sticking out from the wall about an inch. Awkward. Luckily it's positioned 2 stories up, so no one really notices it.