I've played around with many language learning sites and programs but Rocket Languages is at the top in terms of quality and affordable price. Having the dialogues to go through with such energetic 'tutors' certainly helps, as does the multiple forms in which the learner is asked to practice the material. I have found myself getting otherwise complicated-sounding German phrases in my head, repeating themselves when I'm doing something else. I'm looking forward to continuing with RocketLanguages!