It's a beautiful production with great performances! I enjoy it when the Ghost of Christmas Present tells Scrooge off. George C. Scott's interpretation of Scrooge is kinda unorthodox and unique, with his dry, humorless laughter and cold smile. I prefer other actors' characterizations, but Scott sure does look like Scrooge.
Something in that screenplay has always bothered me. Is Fan supposed to be older or younger than Ebenezer? She looks as though she could be younger, yet she refers to "our dear mother's sake"---if they had the same mother, and she died giving birth to Ebenezer (according to the dialogue), Fan must be older. The same question arises in Noel Langley's screenplay for the Alastair Sim version. Perhaps Fan is an older sister who helped to take the place of Ebenezer's deceased mother. Both go against Dickens, who portrays Fan as a very little girl. (The "died in childbirth" angle was created by Langley, not Dickens.)