I recommend The Right Stuff, and In the Shadow Of the Moon. But I've seen just about all that exist.
This documentary is pointless. It manages to tell this exciting story in a boring way. And explains things poorly. I had to pause at several points to explain to my girlfriend the context, because it was just so poorly done and missing the interesting bits.
I could probably go up on stage and improv a better telling of this story.
No, choose another documentary.
I'd give it a 3, but changing it to a 2 because it's so blatantly unnecessary when the story has already been told much better, e.g. in The Right Stuff.