Its treatment of the famous Luhmann-Habermas debates was especially helpful, and I plan to use a number of other sections in my own studies and college teaching for some time to come. I find that the writer understood the importance of orienting the reader who hadn't been comfortable with the science and mathematics that often go with systems thinking.
The author does an especially good job trying to integrate certain concerns with democracy, participative management, and widespread involvement that a systems approach sometimes neglects in pursuit of social engineering by a technical elite.
This book was heavier than a simple introduction, so it is not exactly the front door to systems thinking, but I have found it to be a hallway to many rooms that I am still exploring -- thanks to Kenneth Bausch.