Instant Mandarin - a professional program.
I have enjoyed learning with Instant Mandarin. Its website is clear and very informative that helped me to access into the course easily. Learning time is structured in a way that I can learn in my local time. Daily lesson with new words, grammar patterns and a short dialogue is concise enough to present its relevant content. I can practice right away what I have learned with the teacher. Whenever I cannot download the lesson or access the class, just a moment after sending email to the person in charge, my problem is solved. In my opinion, Mandarin is a professional program.