I've seen a few review that seem quite dismissive about the scope and importance of Lee. But if you know about the limited freedom of women during this time period you will totally appreciate the audacity and productivity delivered here. Lee was spurned on by personal trauma to do good with her hard fought freedom to operate in a man's world.
Lee has all the period clothing and historical accuracy which is no small feat, while showing the sheer determination it took to achieve access to the final Nazi front of WW2. People back home in the US didn't believe exactly the horrors and certainly not the numbers of the Holocaust. It was the undeniable courageous journey by Lee which brought back the unmistakeable proof and witness of an evil place in history
Knowing that one can't unsee certain such things in person gives one empathy for the cost of doing photo journalism. Many get martyred while doing their work when jailed or taken hostage in authoritarian regimes. But in this case, to have survived seems as permanently affecting a way to finish such an important task.