It was my favourite book when I read it years ago and was so happy that though the series diverges, it still has the book's heart. Apparently most of what was cut was Neil's material so Terry's could stay in. It really does feel like a love letter to Terry Pratchett.
I gave away my copy of the book ages ago (to Jane maybe?). Waiting for my new one to turn up so I can re read it.
Also if you read it and liked it, deffo have a go of Pratchett's Death books (since Good Omens is technically one of them), and Small Gods.
A few days after I had to go down to London for a meeting, so like a giant nerd I headed over to St James's Park to sit on one of their benches