The title of "Twin Wall" is a little deceptive. It is NOT a double walled greenhouse. The plastic inserts are just hollow corrugated plastic. We will see how well it keeps the heat in and the wind out. Seems a  little flimsy. Had to call for 2 new metal struts, they were crushed beyond use. Funny though, the box was NOT crushed, so I have to imagine they were thrown in already crushed before it was taped up.

Pros: Looks good
Cons: Seems flimsy, hope it holds up