I have known Dave for about ten years. During that time he has become a close friend, a mentor and a trusted colleague. Dave’s place in the tech world is unique. He is well respected as a serial entrepreneur, blogger, accomplished speaker, and a selfless mentor to founders and management teams. I have taught financial modeling classes with him, and have brainstormed with him on a variety of topics that are covered in his book. He is a good family man, an integrity-based professional, and a tireless and candid cheerleader for founders and the difficult job they do.