Product review (5 stars): cover is easily removable
used this to replace my old dryer vent that vents out the side of my house. I chose this one because:

1) it was cheap
2) it was the exact replacement and size of the one i am replacing.
3) it has a pest and rodent cover on it so that mice and other vermin will not get into my dryer duct.
4) the cover is easily removable. it takes me all of 10 seconds to pop in the little plastic tabs and remove it. cleaning it is a breeze and this is a great option.

no specific cons that i can think of other than that it doesnt come with any screws or anything to fasten the mouth to the wall.