These dramatizations are pleasant to watch and hold your attention. I am giving it only four stars because of two things that man bother some viewers and not others.
1. These were recorded on video tape about 50 years ago (in round numbers). It shows. They have not been digitally remastered. They have the usual low resolution, small amounts of snow, and in one episode, black blobs that stay put during the whole 50 minutes. They usually invisibly blend in with the dark objects and snow, but once in a while a thespian move so that it is on their face. Other episodes have less irritating imperfections. The audio does not have any defects.
2. These are short stories that are stretched out to last 50 minutes. If you consider that a full novel can fit in a 90 minute dramatization, you can guess how much padding is inserted and how many scenes are prolonged. Amateur cultural anthropologists, like myself, will not find this useless. They can enjoy the clothes, furniture, architecture, spoken language, and social interactions.
Anyway, if you are a Holmes fan, you should definitely buy this one.