Later he was to script Freund's other memorable directorial work, the delirious Mad Love (1935), and for James Whale he would script arguably the best of the Universal Horrors, James Whale's The Bride of Frankenstein (1935).
It's definitely not on radar-par with other 30s shockers like Frankenstein, Dracula, The Mummy, et al… but it's right up there with them in terms of quality, content, and sheer spookiness.
Cinephiles will recognize dreamy allusions, most obviously to Georges Franju's Eyes Without a Face, but there are also deep-red hints of early Dario Argento films, Robert Wiene's The Hands of Orlac and its remake, Karl Freund's Mad Love, and the films of David Cronenberg, among others.