This is a fantastic introduction to Mandarin Chinese but it is only the first two hours of an eight hour course.
At the time of writing Audible are trying to get the other six hours in their library but as yet that is not the case which is a shame as these first two hours had me hooked.
The only current alternative is to purchase the full and more costly Mandarin course CD's direct from Michel Thomas. Hopefully this changes soon..
Learning to speak Mandarin with this course is great, you just need to pace yourself and be ready with the pause button on your audio device to ensure you answer before the students on the audio track do.
Also do not forget to print the accompanying course work from the .pdf in your library and mark off what words you are confident with as you progress.
The quality of book lesson 2 is no less than lesson 1 and seems to follow on with out break or change.