Product review (5 stars): The best dryer vent
I replaced an old leaky tin vent with this and love it. I didn't use the extender throat. It is the only vent I found that allows you to easily clean the lint pipe.

I installed it with caulk and four cement anchors. The only issue I ran into was that the screws bowed it a little so it's easier to open the whole vent. Hasn't opened with the dryer on yet thought.