This pergola is unsafe and came incomplete. We’ve had it for less than 2 months and the whole thing collapsed last night. Thankfully nobody was out there, this would have been dangerous especially if you have little ones like us. 
Issue being There is a plate that attaches the vertical posts to the roof. The plate had holes for screws but the vertical piece did not. There was no way to screw the plate on to both and the idea did not appear in the instructions.