I remember this film well, though I saw it a long time ago. I was interested in seeing the film because in Leonard Maltin's film book he said it was something like 3 out of 4 stars, maybe even 3.5.
Well after seeing the film, I wonder if Mr. Maltin actually sees the films that he gives recommendations for. He said it was atmospheric, and the beginning of the film does start out promisingly.
However, that is that. The film really plods boringly along. First you have a European actor playing a Chinese villain in one of the most horrible makeup jobs you could ever see. It is absolutely revolting.
They try to add humor to the film. Perhaps something was lost in the English translation. Watching it was not fun, and did not elicit any laughter. It was in fact embarrassing to look at.
Some of the other Edgar Wallace films are not to bad. But do yourself a favor, and make sure you skip this one. Shame on you Leonard Maltin.