Comes in 3 heavy boxes. A short video would be helpful.  The 2 inch square tubing is very strong and will be good enough for NH weather.  Easily goes together with two people.  Directions only show pictures. No wording so some things can be confusing.  You can not go by the screw dimples on the main frame when installing the first panel.  They do not line up because the panel is not as wide as the picture shows.  Other than that it's straight forward with patience.  Took me about 7 hours from start to finish.  Directions are located in the box with the panels.