After I have already tried several courses, I can only say that this course is by far the best. Why? Now you do not have vocabulary and grammar to learn, no easy listen and repeat. Who does that with perseverance really learns what. Above all, the vernacular. New York Institute provides on its website this course as a PDF file. For me is very important because just as the speaker may prompt it to a medium-or read anything. So you learn even write.