I was able to assemble the unit in about 1 hour after opening the box.  All parts were there and assembly instructions were sufficient together the job done.  The unit worked easily on first live test, after I added the ignition battery, it helped that my natural gas supply line was a proven solution,  as I connect my BBQ there too.  I noticed that the heat radiating down from the heater was a bit stronger 2-3 feet from the heater pole as opposed to right beside the pole, I suspect that has something to do with the reflectors on the heater top panel.
Overall I am quite happy with the heater after 1 week of initial use, and hope it will add 2 months or more of outdoor enjoyment to our backyard experience here in cold Toronto area.