We only had our pergola up for 3 weeks and it is now completely damaged from wind. We had it on a new concrete patio, it was not anchored but we had 35 pound weighted bags attached to each footing. We are having 15-20 mile an hour winds here in South Jersey today and the pergola blew over and is completely bent and damaged. 

I called Wayfair and was advised that it comes with anchors and it should be anchored down, even though the picture they advertise above is on a solid surface and would not be able to use the provided anchors. I advised that I had the weighted bags attached and was told they do not cover acts of God and that it must have been very windy. It looked really nice until this happened, so just beware, it won’t really hold up in the wind and as others stated, when it rains the rain would pool in the canopy.