I hired a handyman to install the posts since I have a deck that’s 12 ft above the ground so he had reinforce the post.  We did not use the galvanize posts that game with the kit but instead used 4 x 4’s 
That took a like 3 hours to install and so I had to finish the rest which surprisingly was very easy to figure out.  
Also my deck was smaller in dimension than the kit but we were able to adjust the pergola with no problem.