Product review (5 stars): Love it!
It's a little larger than I'd prefer, but works great.  I am so happy to be rid of the old 'flapper' vent.  I could not get close enough to the ground to see inside and am scared to death of spiders, so I didn't dare put my hand inside it.  I used a brush, but never knew if the flapper was closing all the way.  How would i know....I couldn't see it!

I'm hoping it does paint over, since we're getting ready to paint our buildings.  The contractor told me they can't paint plastic.  I told him that I 'think' this is PVC and hopefully they can paint it to match the building.