I'm writing this review on the beginning units so it will be of use to anybody contemplating trying these lessons. I have all three phases and have been in China and I would highly recommend this course. For me, these have been very useful tools for laying the ground work for speaking Mandarin. With only these lessons I have been able to get around in China and generally convey what I need.
This is a fabulous way to learn Mandarin. The instructor makes it so easy! I REALLY hope audiobooks will get the rest of the series.