Yesterday, we had a workshop with Mary at the IT University in Copenhagen. In case you don't know Mary, she is one of the most important people in Agile and Lean software development today. The workshop was arranged by BestBrains.
I can strongly recommend following Mary's advices. She is experienced with real life software development, with managing, and has many good points. And it's nice to hear her confirm, that being 100% Scrum is not being 100% Agile. I totally agree to that.