Just saw Until the Light Takes Us.
Found it very absorbing although not especially illuminating. The most interesting thing was how different people came across:
Varg- kind of like a psychopath- but a very polite and eloquent one
Frost- extremely eccentric but also quite mild mannered.
Hellhammer- like an utter turd... really, I never realised he was quite such a douchebad.
Fenriz- just how you would imagine him from all his interviews
Abbath and Deimonaz- like they thought the entire thing was hilarious