To quote to the movie cliché on the back of the VHS cover, this is old-time adventure, "the kind they don't make anymore."
Well, they've always made good adventure stories through the years but you get the message: it's simply a good, solid story done well on film .
What puts this a notch above other adventure tales of its day are: 1 - excellent cinematography; 2 - interesting aerial scenes with neat-looking planes flying in the fog and around and above the treacherous Andes Mountains; 3 - a top- notch cast featuring Cary Grant, Jean Arthur, Rita Hayworth, Richard Barthelmess, Thomas Mitchell, Allyn Joslyn, Sig Ruman, John Carroll and Noah Beery Jr., and 4 - a story that is generally interesting.
I say "generally" because there are a few dry spots, mainly Arthur's continued pining over Grant, but most of it fun to watch and it gets you involved in the story. Ruman and Barthelmess were especially good in their supporting roles. Hayworth's role, one of her first, was not that much.
In all, a solid adventure-romance tale, and I'm shocked it gets so little attention on this website, with under 20 reviews as of my writing.