Having just read the novel again, I had high expectations for this BBC miniseries from the early 1970's. The one positive element of the film is that is does indeed follow the novel quite closely, unlike the 1992 film with Daniel Day-Lewis. (Which, as a movie by itself, I like very much, but as a big fan of the novel, was shocked at how different it was.)
Several elements disappointed me about the miniseries. The very poor transition from indoor sets to the outside filming distracts the viewer because we're so used to seemless transitions in modern television. I understand that this was 30+ years ago but then again, "Star Wars" was 30 years ago and that looked realistic. Some of the sets looked like styrofoam.
Another problem that bothered me very much was the grouchy, unpleasant, scowling Colonel Munro. From the novel, one sees him as a loving and doting father whose heart is broken by the kidnapping of his daughters. In the miniseries, he hardly opens his eyes because he's constantly scowling. I didn't have a lot of sympathy for him in the film, and his grief over Cora's death is practically nonexistent. This is a big change from the novel and I didn't like it.
If you love the beautiful language of the novel, then don't expect that to translate onto film. Hawkeye's conversations about philosophic concepts seem stilted and unnatural in this miniseries.
This is worth watching once, especially if you love the novel like I do, but I'll be reaching for the novel before I pop this back into my DVD player.