We had been searching for a cover for our pergola (don't know why they are not offered with the pergola!). This fit the bill.  Would have given it 5 stars but it would be so much easier if there were grommets spaced evenly on all sides..not just the corners.  So far holding up to the ocean "breezes" that we have daily here in Florida.  Provides the shade we desired from the morning sun on our deck.