Product review (5 stars): Love this vent
I purchased this to replace an old, yellowed vent that the lid had cracked off.  This was a big improvement.  The lid fits tightly and the flow from dryer is strong enough to lift the internal cap with ease.

Since my vent is on the south side of the house and receives daily sun exposure, I followed others recommendations to paint it.  I chose some white spray paint formulated for plastics.  A few light coats and the vent is now protected from UV and blends nicely with the white house.

You might need to have a tube of silicon around for when you mount it to the house if it is not flush.  Mine mounted perfectly to the existing mount after I drilled 2 new holes.