These are so heavy duty and sturdy.  I was very surprised at how heavy they are, in a good way.  We get a lot of wind at our house, and so far these have not budged at all in the wind.  Once I put one together, they were pretty easy to assemble.  It does take 2 people since some holes are not predrilled.  You need one person to hold the parts in place and another to drill the screws in.  Overall, I'm very happy with these.