It held up during KY unusual wind storm! Some panels had to be adjusted as I had not caulked any panels yet. Directions were not very clear. They are listed as view from inside greenhouse for left and right sides. I was missing a few screws and the company is sending them to me. They were able to put it together, but some screw holes are empty in the middle. It took 2 men 16 hours. We laid hardware cloth, landscape fabric, then pea gravel inside. They leveled the greenhouse and attached ground contact wood around the steel base that doesn’t go in the ground. Next we are putting pea gravel beside the wood outside the greenhouse. You can open and slide the windows and slide them off if desired. So far I am very pleased with the product!