In 2013 there has been a research about this method about this method. You can read the entire research here (in Dutch).
A summary of the results is listed here:
- Home
- Chapter 0 Information
- Chapter 1 The basics
- Chapter 2 Fingerings
- Chapter 3 Chords
- Chapter 4 Analysis
- Chapter 5 Scales
- Chapter 6 Exceptions in the analysis
- Chapter 7 Special topics
- Ask Sanne