Recently I listened to a great interview of him on The Productivity Podcast.
What I like best and why you should check him out.
He has a busy life. He is a triathlete, a consultant, and a husband.
He seems to keep it all in balance.
His ideas come from years of experience with clients from all walks of life.
I would really encourage you to check out his work. He shares some really good tips and principles about GTD.