do the trip7 out of ATL--prob get biz class--you can't get that on NW. 15 hrs in coach has to be horrid--it's pretty nifty in biz eilte. then pcik up the NW to HKG. make sure you find the escalator--what a hoot!! take the cheap ferry thru the harbor. get an octopus card including the airport train. are you overnighting in NArita? get discount from PanPacific hotel aka email info@naritatokyu.co.jp LAst price they ofered me was around 11000yen?
Best runway view is from their bar on 11th floor. Eat elsewhere--$$$$

I've only been offered business once on AF--my seatmate had to ask the FA to serve me--he couldn't figure out why she was ignoring me and I couldn't really tell him I was nonrev. Service really sucked but that was many yrs ago. I will avoid AF like the plague personally.