The structure appears to be well made.  I'm happy with the overall quality and appearance.  The instructions were sometimes difficult to comprehend.  Some of the structure had to be removed and reinstalled via common sense  and hole counting procedures.     My biggest complaint was the roof inserts labeled F through F4.   These clip on pieces should have been spot welded to the roof panels prior to powder coating.   They have the annoying tendency to fall off of the roof panel repeatedly.  Each one had to be clamped on tightly with vice grips, and still, with the slightest provocation, they would fall off.    Over all, I am pleased with the structure.