This early talkie was the first official film adaptation of the Bram Stoker classic (1922's Nosferatu was "unofficial") and a very atmospheric horror film it is too...
Bela Lugosi plays Dracula, already having played the role on stage, and to be honest this early depiction of Dracula is hard to beat - only Christopher Lee can match him in the Dracula stakes (ahem). Lugosi set the blueprint for screen Dracula with this film and gothic horror in general.
Its not a perfect film, the sound is a bit harsh at times and the ending is rather abrupt but the feel of the film is spot on especially the creepy scenes around the castle.
Its a film with a lot of fog, and floppy bats. Well you have to love it.