For practical use the best exposition is his book "Right Weight Right Mind". Ostensibly this is about weight loss but it applies to almost any change process. A single data point is that it seems to have solved my weight control problem when nothing else has worked so well over a 25 year struggle. What impresses me is the ease with which I am losing weight whereas before it was a gritted teeth tough struggle.

I am not applying it to other things such as akrasia - specifically getting in 4 hours of really hard work each and every day (which I think is the human limit).

Summary here https://drive.google.com/file/d/0B_hpownP1A4PS0JkMzZjelQzUzA/view?usp=sharing

Of course it is not an answer to every problem but often when change proves impossible there are other competing commitments and Kegan's process is a really good way to uncover and deal with these.

This comes out of his work on personal growth and development which I think is also something special. Summary here and some links

https://drive.google.com/file/d/0B_hpownP1A4PdERFVXJDVE5SRnc/view?usp=sharing .