Short story: Spano lied his way into owning the team for several months. He was praised by the league (and commissioner Gary Bettman) as the franchise's savior, then was exposed and wound up doing jail time. It was disgraceful, amazing and, in plenty of ways, impressive.
He doesn't have many regrets—and his hilariously horrible relationship with then-coach/general manager Mike Milbury remains a particular point of pride. Spano actually managed, he said, to force Milbury to step down as coach during his "ownership."
The two clearly hate each other, and went back and forth throughout the film. One highlight: Milbury, currently an NBC Sports commentator, saying Spano offered him sex involving two women at a nearby hotel. He laughed and said he declined. Spanos, presented with the claim, laughed and said Milbury was correct.
Beyond that, there aren't many positive feelings between them. Even while it was airing, this happened on Twitter (via @TravisHeHateMe):
Naturally, Milbury said stepping down as coach was his own idea.
