Assembly directions were too vague. Simply pictures for assembly were not clear enough to fully understand what to do and look for. The upper  support framing steel rods on the 6 ft sides did not have holes to attach the vertical sides for proper bracing support. The directions claim that 2 people should be able to complete the assembly in 2-3 hours. I had help for the first day only, we worked for 6 hours and still did not have all the walls up. I've been working for 2 days by myself and still don't have the roof or doors assembled. I was forced to replace the upper horizontal supports with wooden 2x3s to ensure a solid and supportive structure. This is a quality control issue. Holes were not drilled that should have been completed before packaging for shipment. I have built and assembled other structures and have not had this kind of problem.