Product review (4 stars): Good product.
Good product. The old one was over 10 years old and totally cracked down when I tried to clean it's louver. Bought this and hopefully it will last.

After I climbed up I noticed that the screw locations are different than my original one. So I have to drill new holes. The I found that under the original cover, the dryer vent tube was not rounded (probably over time) but rather oval shaped. and this thing has about a half inch round tube in the back. I was about to return, but figured what can be wrong? So I took a hammer and shaped that tube a little, then bent the tube on this a bit, it sits right in.

As you can see the screws still didn't go all the way in, but it held down the cover pretty well. There's a small door inside the hood, you can see my picture, there are when it is closed and when it is open (when dryer runs). Works perfectly, much easier breath than my original cover (for it's been almost fully stuck by threads and hairs blown out). On the first run, it blew some residual out as you can see in last picture. But before I go up to clean, it's gone. Either by blown off from dryer's air or the wind. Anyway, it's self-cleaning, which is good. Wind might be able to blow open that round door a bit, but very unlikely. Only time I see it flapping a little is when the AC unit (which is right next to it) runs.

Overall, satisfied with it so far. Good buy.