Yup, +1 for King Kong.
I do agree they are a good cover for a very fair price. For me, in a very high humidity environment, I like that trapped humidity can escape through Weber's new style. But if you are more concerned about precipitation rather than ambient moisture, the King Kong ones are a better choice.
I will have to re-share this funny comparison. So just how close can you get without copyright infringement:
I got some Texas Grill Covers off Amazon for my Genesis and Performer a couple of years ago. They are still in great shape. Have a Classic Accessories cover for my WSM - it seems to be lasting also.