  We summarize the current view on Parton-Hadron duality as it applies to B
meson decays. It is emphasized that an OPE treatment is essential for properly
formulating duality and its limitations. Duality violations are unlikely to
become the limiting factor in describing semileptonic B width vis-a-vie higher
order corrections. The consistent extraction of the b quark mass from B
production and decays provides a striking example of the theoretical control
achieved.
