Watched it last evening - too much dramatisation, and frankly nothing that anyone remotely interested in the Comet 1 saga would not already have known. I'm not sure how much factual; information someone new to the subject would have gleaned amid the froth either.
One thing that did intrigue me was which Comet did they use for the ground shots. The undercarriage and baggage door seemed Comet-ish though no shots of the whole aircraft were shown. Were the ground scenes filmed at Duxford, or perhaps Wroughton?