This is a 30-page overview of phonological features, which I wrote for the phonology classes I teach at NYU. It is intended to be accessible to both undergraduates and graduates; I usually ask the undergrads to read sections 1-4 and 9, and the grads to read the whole thing. If you would like to cite this review in your work, refer to it as follows:
Gouskova, Maria. 2016. Features in Phonology. [pdf] Ms., New York University.