With a slight but bizarre story, and all kinds of special visual effects, this is one of the weirder but more interesting features of its era. It's not really a great film, since some parts of it don't quite work as well, but it's very interesting, and it would still be interesting even if it had been made some years later.
The story comes from some of Winsor McCay's comic strips about the "Rarebit Fiend", and the offbeat material indeed seems ready-made for cinema. There is just enough to the scenario to allow for a wide range of camera effects. Several sequences effectively and creatively combine panning shots and stationary views superimposed on each other to create an effect. The "whirling" effect, towards the beginning of the movie, might be the best one.
There are a number of other features from the first decade of the 1900s that might be even better in terms of the visuals, and/or that are more enjoyable as narratives, but this is still one of the movies that those who enjoy watching these very old films should make a point of seeing. It's unusual, experimental, and interesting.
