I gave this movie an overall 5/10, but it's very episodic, and I'd like to mention that there's one gem in there, the "temple" or "Guru" sequence which starts exactly 15 minutes in and lasts for about 20 minutes. Firstly because it's sexy (okay, most everything with Gemser in it is). Secondly, because it's shot beautifully - the temple itself as well as the proceedings. But what I liked most was the excellent sense of humour, with real gags - something not frequent in "erotic" movies and mostly absent in porn. The humour is building throughout the sequence, starting with Emanuelle encountering an only half-convinced believer girl, then rudely disturbing a mass meditation/orgy (by joining and bringing a guy to orgasm prematurely), then observing the proceedings in the "training hall" which are really a hoot, but this all gets topped when finally, of course, the skeptical Emanuelle gets her hands on the Guru himself ... I don't want to spoil anything here but their encounter and its aftermath form one of the funnier moments in film history and would fit equally well in a Monty Python movie. Usually with this kind of movies you expect to laugh out because it's "so bad it's funny" - in this case, it's the real thing.
Highly recommended for this scene alone; everything else is more or less the usual "Black Emanuelle" stuff plus some rather violent scenes (fitting the sex trade theme but definitely not erotic).