My greenhouse is now 2 years old and has withstood strong winds and heavy snows without fail. I read reviews back when I made my purchase that spoke of damaging winds and such and blamed the failure on the product, those opinions gave me pause. Now I believe those failures must've been due to the customers failure to properly anchor the structure. I made a foundation out of rail road ties to which I anchored my base and my greenhouse still stands even when wind or ice were snapping trees like toothpick.

Pros: Long lasting and doesn't cloud or discolor like some others
Cons: assembly is daunting