Some sections, such as the TVM and Risk and Reliability analysis, are missing from the usual BB training and are welcome additions for extending the traditional Six Sigma methodology to `Lean' type projects.
Screen shots of Minitab and Excel make it a useful resource for refreshing techniques learned long ago.
The application of reliability analysis to call center abandonment rates is an interesting application of known techniques to a new area.
"The Six Sigma Handbook" is one of only a few reference books on Six Sigma that I have at my desk.