I have read Wuthering Heights quite a few times now, and have seen 3 film versions: 1978 (this one), 1992 and 1998. Of these 3 this version is by far the most accurate to the book, often playing scenes line by line from the original. Such accuracy is often a book-fan's dream, and since I am a fan of the book, I expected that this production would be satisfying to watch. However it is sadly lacking in many parts. Some of these I can forgive, such as the bad special effects and often strange camera angles (scenes often play out using reflections of the actors, not the actors themselves). The sets and scenery look good and fit the book descriptions. Characters sometimes lose their Yorkshire accents, but that is common enough in many films.
Where the series is lacking is in the credibility of the acting. Many scenes, especially those with the child actors, suffer from really bad acting, and even the principals seem to simply perform their parts rather than become the characters. Ellen Dean was one of the only believable characters, though Joseph, Hindley, Edgar Linton and Hareton didn't do too badly either (though they made Joseph too nice). The leads playing Cathy (1) and Heathcliff were good in some scenes and downright terrible in others, so the passion or hatred they seemed to have at one point had completely fizzled out in the next and they were wooden again. Both were too old to play the 20 year olds they were at the beginning (though this is a common problem with adaptations of this book). The woman playing Cathy generally did a good job in other scenes, but Heathcliff failed to do so well, especially near the end. It was this poor acting that, sadly made the adaptation quite boring and stilted.
It is evident that this book struggles in being adapted to film. Both the other versions I have watched take slight liberties with the plot and are much more watchable and enjoyable for it, though this may be due to other features such as the acting and directing. I wonder how they would have done with their actors/ directors using this screenplay... One can only hope that eventually a version will be done that sticks this faithfully to the book and yet has a better team to pull it off and make it watchable.