It's amazing! I just finished episode 4 (about the British couple held by Somali pirates for over a year) and had to pick my jaw up off the floor and talk to someone about it. It's mental.
Now, I am used to the incredibly awful crime re-enactment, "I shouldn't be alive" genre of these sorts of programmes (and love 'em) but this is on another level. Anyone willing to admit to this?