We are just in the process of constructing it.  So far its going well although it is a big job.  Good thing I have a couple of strong guys putting it together.  It took 3 of us about 6 hours to construction the frame.
Only issues we had was a few boards had little splits so we filled them with  wood glue.   
Today we are going to construct the roof panels and we will definately need extra help getting them placed on top of the frame.  Overall feels really sturdy and very nice looking