I had never seen/listened to the recons/audios, so watching the DVD was my first experience of the story.
Having watched it once, I think it's a fine story, the only thing that irks me a bit (like several other DW serials) is that the plot seems to be spread out very unevenly in terms of pace, over the 6 episodes.
What I mean is, by the end of Part 3, we still have no clue as to how Sal. is producing the disasters (or even IF it really is him, or just some weird coincidence). All we know is that GK and his little group are against Sal, and have roped The Dr into impersonating him, and Jamie & Vic are pretending to work for him. Not much has happened yet, Sal. seems like a nasty guy but what's he up to and why? Then in Part 4 (or is it Part 5) ...wham, it's suddenly 'all go', the underground stuff is introduced etc.
I was half-way through Part 6, looked at the DVD timer and I thought, Wait a moment, there's only 15 minutes of this thing left, and it feels like it's only just building up to the most exciting part. They'll never resolve all the plot threads in the next 15 minutes! ...And indeed it felt like the producers had only suddenly realised that they were in Part 6 and still had to finish the thing! Slow, slow, quick quick quick!