I was going to ration it out to an episode or two a day, but I've ended up binge-watching it all between last night and today. An excellent adaptation that manages to capture pretty much all the essentials from the novel, and brings the story to the screen very well.
If I had any criticisms, it would be that the demon costumes/headgear were a little on the silly side, and that the kids didn't get quite enough screentime - but those are minor quibbles. Overall, very well done.
I was also only going to watch an episode a day, but also ended up binge-watching the entire thing in one evening.
I really enjoyed it - Tennant and Sheen were brilliant! I was a little disappointed that the "other" four horsemen of the apocalypse didn't feature as that was my favorouite bit of the book, but lets hope Neil can be persuaded to produce Good Omens II: 668, the neighour of the beast