I've yet to assemble the arbor. The materials appear to be very sturdy. Unfortunately, my arbor arrived in a box that was completely opened and damaged. There doesn't appear to be damage to the arbor itself, but unpacking it will tell if damage or missing parts are to be found. Considering the condition of the packing box, I'm a bit apprehensive to do an inventory of parts.
I found the UPS driver on my porch with the destroyed box and he said he was leaving a note on it as he had never left a package in such bad shape on anyone's doorstep.
With a bit of luck and a prayer, all parts made it and none of it is damaged. 
I think Wayfair is awesome, but should really look into whomever is distributing this item through Wayfair and let them know that their packaging for this heavy and "awkward-to-lift" item needs serious re-engineering and attention. 
If anything is wrong, I will be contacting Wayfair for a return, or replacement.