39 years ago I went to a SF convention in Birmingham, UK and, somehow, with a group of close friends, ended up having dinner with Neil Gaimen. During dinner he mentioned the new book he was writing with Terry Pratchett, called "Good Omens". He described it as "an apocalyptic story with comedic overtones". Several months later I was privileged to be at a small private reading of the book prior to its official release and ended up with a signed copy. I read it from cover to cover, many, many times and often wondered if a film would ever be made of it. I was worried that no-one would do it justice.
Tonight, I have just watched all six episodes and all I can say is "Wow". To make this as a film would have been a colossal mistake. To make it as a six part series was the best decision ever made.
The casting was inspirational. Adria Arjona as Anathema Device was brilliant. She matched the character perfectly. David Tenant and Michael Sheen as Crowley and Aziraphale were just inspirational and Jack Whitehall as Newton Pulsifer was brilliant. As for the rest of the cast, no-one could have done better.
The direction was awesome, the camera work was amazing and I loved how the the book's footnotes were worked into the script (bit of a trademark of Mr Pratchett).
Whether or not you will enjoy "Good Omens" depends on your sense of humour. If it leans towards slapstick or visual you may not. If it leans towards finding humour in dark situations you probably will. It also helps if you understand the trials and tribulations of driving on the M25, the London Orbital Motorway.
I will ask only one thing: Please, please, please, don't let anyone attempt to do a sequel.