Simply cheap... terrible quality if you live anywhere that has weather that includes wind or extreme temperatures.  The plastic is brittle and thin, zippers are flimsy and aren't strong, the wire racks needed to be zip tied down to the structure, and the structure doesn't secure itself together during the build (safety snaps, locking pieces, etc.). If I could get my money back after experiencing this through the season... I would and file a complaint to QA.