The film is remarkably blase about the trip itself, with a cue card blithely stating that they were then trapped in the ice for 9 months, and briskly proceeding on to describe the various cute faces that the dogs made. Which is simultaneously surreal and delightful. Though it occurs to one that in 1919, images of penguins were probably as remarkable as those of the ship, and of equal interest? But while the scenes of seals scratching themselves are riveting, the shots of the ship trapped in ice really are incredible. And what you do see of the crew is kind of marvelous, though it has that eerie sped up quality of silent films.
So ultimately, I didn't learn much about the expedition (I plan to rent the more recent take on it, Endurance, soon - I wonder if/how it'll incorporate the original footage), I did enjoy the film tremendously. Definitely worth checking out.