The pergola turned out pretty nice, and it seems to be sturdy.  However, the pergola did not come with directions.  The directions linked into description was for a different model.  I was able find the directions online.  With a few readjustments, we were able to put it up failrly quick.  I would recommend at least three or four people to assist.  While two can do most of the work, the extra set of hands will prevent damaging the pergola.  It also makes it a lot easier to assemble the four posts.