It is a fantastic method. However, there is a major roadblock that frustrates many self-learners. You have the PDF, but you cannot find the audio—or worse, you find audio files that are corrupted, incomplete, or mismatched with the wrong edition.
It sounds like you’re looking for a version of the Assimil Indonesian With Ease package (book + audio). assimil lindonesien sans peine pdf audio verified
A: Yes, Assimil also published Indonesian with Ease (the English equivalent). However, the most popular and widely "verified" community version is the French version. It is a fantastic method