I have become quite cynical as my latest 16 mil clear cover has a "full 5 year warranty", but at the end of 3 years is getting binned.

The bubbles are all popping out and...."Sorry, that's the ONE THING the warranty doesn't cover...it only covers seam separation and delamination."

So the next one will be the cheapest clear cover I can find...If I've got to trash it after 3 years I'm not wasting the money on an expensive one again.