We just erected the pergola and it’s very nice- the the finish and scale are great!  Not too hard to assemble however the tarp is disappointing - as the shorter sides have no way to not sag horribly and should have tie backs that allow it to stretch fully.  Lastly, the 16’ metal joists/headers  do sag also I guess due to the 3 pieces connected over such a long span but despite these factors it’s a very nice build!