http://libremdb.catsarch.i2p/title/tt0079592/reviews
However, I must point out that it's easy to feel a bit lost later in the film and you should NOT stop watching. Stick with it--the payoff is great and everything is tied together very well. I am not sure, however, if Arthur Conan Doyle ever would have written such a story as it's tone is very anti-British Empire!