I think your course is well organised and is great for beginners as well as more advanced. I've only listened to about 30 lessons so far. I like that at any time I can review lessons. It's also great to be listening to native speakers. Unfortunately there is no short cut to learning a new language especially when it comes to tonal Asian languages. Conversation context is great.

Seeing the pinyin makes a big difference. I like to picture it in my head when composing sentences and having the tones works helps a lot. Your product is great! Especially now I can visualise the tones.

In preparation for a trip overseas, I looked around for months trying to find a podcast/website that would help me learn Mandarin. So many were complicated to navigate or had really boring lesson plans. Some podcasts had audio that was not clear or were chanted by dull teachers. Some are just lists of vocabulary or phrases that you memorize, without context. A lot of bad teaching. I had almost given up and then found Chinese Learn Online. What a difference! The lessons are brief, memorable and logically arranged. The audio is clear and the narration friendly and very informative.