We purchased the Willow unit about a month ago.  It was delivered in our driveway as expected.  The five boxes were heavy and with the help of a couple neighbors, we we able to get them in our garage to unbox.

After carefully reading the directions,(three times) and separating the pieces, we began the  assembly in the garage (it was raining outside) building the frame.  Our site had been prepped the week before with 4x6 timbers and 5/8" minus gravel.  Once we had a clear understanding of the directions, the rest was easy.  Within a couple days, our greenhouse was up and almost ready for the growing season.

We opted to hardwire and plumb the building with underground utilities which made for a unique custom build.  The greenhouse is now fully functional with water and electricity.  The only thing left is to seal it but we'll wait for warmer and dryer weather (we live on the Washington coast).