Practically defines the iconic characters on film, but does not quite nail the tone needed for the quasi-Gothic mystery tale. So it never quite reaches its fullest promise - which is fine, because it launched 13 more films to be safe. "Watson - the needle!"
Seeing the Hammer adaptation of Hound of the Baskervilles kind of ruined this one for me. It's not a bad movie and the chemistry between Basil Rathbone and Nigel Bruce seems a couple notches better than Hammer's production. This version comes off as less ominous and the ending seems abrupt to the point where you wonder if the production's financing got cut off. Not a bad movie, but Hammer's version is more rewarding.