This film version of the H.G. Wells science fiction classic works very well. It has a number of strengths, but it benefits most of all from James Whale's direction, creativity, and technical excellence. Both the flashier aspects of the movie (such as the "invisibility" effects) and also most of the basic elements are done with skill.
The story is for the most part based on the one main idea of "The Invisible Man" who combines his scientific genius with a generous supply of madness. The story is interesting enough in itself, and of course it provides all kinds of opportunities for visual tricks. Whale hits just the right balance in making good use of these opportunities without over-indulging himself.
The visual effects themselves are of excellent quality, and they are far better than all but the very best of the present-day computer imagery. While it is usually rather easy to spot which parts of a movie are computer-generated, Whale's effects are all but seamless, with the exception of a handful of brief moments. They are often quite impressive, without resorting to tired devices, such as explosions and the like, in order to impress those with shorter attention spans.
Claude Rains does quite well for having such limitations on what he could do. The rest of the cast is solid, if mostly unspectacular, letting the story do the work. Una O'Connor somewhat overdoes it with the screaming this time, but otherwise the characters are believable. The acting may seem slightly quaint to those who are accustomed to the pretentious styles of the present generation of performers, but it's certainly better than the grating, self-important performances in some of the recent movies of the same genre.
While the story does not have the thematic depth or the suggestive imagery of horror classics like "Frankenstein" or "Dracula", this adaptation gets everything it can out of the material, telling the story in an entertaining fashion and with technical skill.
