I got this version to watch together with my kids. Apart from the rather frightful appearance of the dog at some points it is perfectly suitable for the whole family and rather fun to watch.
The quality of the animation, sound and general appearance is a little outdated, but this does not lessen the enjoyment. The plot is very true to the original story even though some scenes seemed a bit cut short to me. The length is only 75 minutes, so I suppose they had to leave out some dialogue. Quite acceptable, considering that in some other versions that I watched the dialogue goes on endlessly about inconsequentialities. In spite of these cuts a few things were explained that were not mentioned in other movies, like for example how Holmes tracked Stapleton’s past and found out about his marriage. My boys followed it easily and It was perfect and spooky/cosy entertainment.
I watched it dubbed in German, so can’t comment on the original voices, but Holmes’ voice is Peter O’Toole which should give a bit of additional flair to the whole experience.
Side note: I read one very unfavourable user comment about this cartoon on imdb, but that reviewer claims that the Basil Rathbone version is “excellent” – which says it all.