We have had the 16x12 hawthorne pergola for about a month now.
It was much heavier duty than I expected.  We found assembly to be pretty straight forward.  We have had 4 or 5 storms so far and the pergola has now moved at all.  I did put 2- 10 ft 3/4 inch white plastic pipes across the sunshade to hold it down and to keep the wind from ripping it.  Works good so far.  It is very sturdy and I would buy it again in a minute if I needed to replace it.