Budgetair have had some stellar deals to the US for me lately. Couple of work trips cost me less than it cost them (the invoice says what they've paid for the ticket). Didn't make much sense to me but I'm not complaining :)
Lots of waterfalls I guess, just pot luck if you get to see them! Either way its still great ticket price.
That would be the Milford Sound that's surrounded by rain-forest would it? There's a clue there as to the prevailing weather conditions, whatever the time of year.
Some people complain about the strangest things when travelling, you see so many complaints about hostesses being unfriendly, I don't care about that personally, I'm buying a flight not an escort.
It's visa free for 144 not 72 hours for having a layover in Beijing: https://www.travelchinaguide.com/cityguides/beijing/144hours-visa-free.htm