very good material

The Indonesian Way is a very good material for learning Indonesian language. I have tried other materials for beginners before but I find that this one is the most well-defined, and also the most agreeable. It has very clear explanations, useful exercises, and, most importantly, always revisits previously learned vocabulary. It involves all the four sections of learning a foreign language: listening, speaking, writing (to a lesser degree, however), and reading, with the most emphasis on listening.
I would suggest, however, slightly more exercises for each lesson, and to make sure every lesson has one or more full support-texts (written or audio), as an example for the grammar or else, just a few lines, so that we can see exactly how the vocabulary can be used. Most lessons had examples like that, but I think some not.
Also, one or two lessons contain listening exercises with contents that are extremely heavy (one was about a national park in Kalimantan) for the beginners level
On the whole, I strongly recommend The Indonesian Way for learning Indonesian! Me, as a level 0-student (with Romanian as mother-tongue, so quite different), I already feel like I can speak and write some sentences freely, and I remember easily the vocabulary.