We recently installed this pergola.  It was quite a project - it took 4 people about 5 hours to stain it (we though stain would help protect the wood in our shore environment), and 4 people about 5.5 hours to put it together.  The instructions are decent and it is not hard to assemble (other than the attaching the top rails to thee top post which was a bear).  However, there are a lot of pieces, many steps, and it takes some time.  We definitely needed 4 people to move it once it was assembled.  We really like the finished product.  The pergola creates a sense of space and makes the area under it feel like a room.  The quality is good and the delivery process was flawless.  We would definitely recommend this pergola.