I bought this cover for our grille with the side smoker.  The first Char-Griller did a great job but died due to weathering outdoors.  Since it is an awesome grille, naturally I replaced it with the same.
This cover was purchased soon after the grille so it wouldn't suffer the same fate.  Mission accomplished!  Our grille still looks good and works  well.  The bonus of it's full length means items stored on the shelf underneath stay out of the weather too.  As long as I'm careful not to cover it until it's cool moisture and rust is never a problem.
It has lasted in full weather and sun with no overhead cover for 7 years and has finally split the seams on top.  Pretty good value and I'm replacing it with a new one.