I helped my son put this together yesterday.  He said it was like building with adult sized legos and loved how easy the instructions were to put it together.  I was primarily his "gopher" and only had to help physically a couple of times.  The door is sticking a bit but he will try to figure that out later.  After tearing down my old shed and putting this one up he was done for the day (about 6 hours total for BOTH projects).