The negative reviews of Robert Stan's 'Film Theory: An Introduction' are right to say that the book is predominantly theoretical, in that it provides a survey of theory on film.
So, if you want something more concerned with film technique (camera shots, sound, production), then perhaps look elsewhere.
However, this book does provide a comprehensive, extensive account of Film theory, surveying the biggest movements in European philosophy, and providing some examples along the way - though, as I said, it is less about applying these theories (though they should, no doubt, stimulate some sort of response in you - "Ah, that's an interesting way of considering Citizen Kane!" etc.) than considering these developments themselves, which is very interesting itself. Then again, it depends on what you are looking for.
Stan covers, amongst others, the Russian Formalists, Auteurism, Structuralism and Poststructuralism, Psychoanalysis, Feminism, Queer Theory, Cultural studies, Phenomenology, Intertextuality, Postcolonial theory, Postmodernism, the theories of Gilles Deleuze, and new developments in digital cinema.
It is very comprehensive, the chapters are around 10-12 pages long, written clearly (he defines terms, considers other interpretations, considers their impact and their links between each other).