Not too campy (except maybe for the fake blood looks awful), good stories, amazing looking for a 70's film, and the soundtrack is pretty damn spooky.
The opening story even has one time hottie Joan Collins getting killed by Old St. Nick (or a lunatic in a Santa costume at the very least).

I guess you can file this under a "holiday cheer film" because of that. Totally reasonable to watch it during this time of the year.
5 uber-creepy stories. As great (maybe better?) an adaptation as the Twilight Zone film in the 80's.
I will even go as far as to say that it is one of my favorite 1970's British horror films.
This guy digs it.