I really enjoyed Hogfather and I'm pleased to say so did the Monkeys. It's always a bit tense when something so well imagined is given the TV treatment, but I wasn't disappointed at all. It's the first time they, the Monkeys, have encountered Discworld - the fact that my 15 year old managed to stick with it says a lot, though we have Death to thank for that :)
Only watched the first part so far but very good. However it is a little slow and the constant switching between short scenes is slightly annoying. I expect that once Susan reaches the Tooth Fairy's castle it will speed up.