I've tried to learn several languages online, but got quickly discouraged, either because the course was too communicative, or because it was too "traditional". I didn't have the chance to learn Polish any way other than online, so I wasn't entirely convinced, but I registered for a course on e-polish.eu. To my surprise, for the first time I encountered a course there where the communicative method was accompanied by clear grammatical commentary. At the start of the course I relied on this fairly often, but I now I have convinced my self that the material is so fantastically well prepared that I don't really need the comments. I really am learning through pure communication.