Following are few things clients say they have learned, in their own words.  Each client expresses it differently, but the following example is representative what they all say.
 

• How to set "hairy audacious goals", learning how to know when to let nothing get in your way, when to back off, and when to be confident about your choice
• How to lead, and that actions are generated from our mindsets
• Trying on a mindset and then soon it becomes natural and self-fulfilling
• How to be in a way that makes others change their behavior in a positive way, consistent with your vision
• How and when to have difficult but honest conversations
• How to reframe problems so your biggest annoyance becomes your biggest source of new possibility or opportunity
• How to help people find an adrenalin kick from inside and from what they and their team are up to
• How to deal with unhelpful conversations
• How to notice that the world lines up with what we're committed to
• How to start having someone create a new listening for you
• How to handle colleagues' failure against their commitments
• How to find excitement in looking for a new possibility out of a brick wall
• How to open up new possibilities.

"Your program is one of the most audacious change programs I have encountered in any organization - both in terms of the scope and ambition of the aspirations it has created, and in its bold approach to shaping new values and capabilities across the business."

Norman Blackwell
Partner, McKinsey & Co, Inc., UK