Product review (3 stars): Quality control is not good
Be sure to check really closely to see if there are any dents hiding under the protective film before hiring some one to install this.  It is hard to install (horrible instructions) and, unfortunately, I didn't see dents until after I had paid to have it installed.  I sent a picture and they sent a replacement outer chimey and gave me a $77 discount.  It looks good now, but I had to pay the guy to install it again.  It seems to vent well and is a decent price.