I am delighted with the arbor. I had no problem assembling it, but I did use a 1” X 3” brace across the bottom to help stabilize it during construction and putting  it in position. With the gift of hindsight I regret not having used some diagonal bracing on both sides. Since the side panels are a dry fit, the assembled arbor is somewhat rickety until it is in place in the ground and diagonal bracing would promote more accurate placement. I strongly recommend that you add a note to this effect in your instruction leaflet.