I would say that Stern has been a success on the business side of the equation, growing the League and bringing it to world wide prominence.
On the other hand,it appears that he is not so much a good judge of character if, indeed, he does take a personal interest in the hiring of referees. There should definitely be some sort of checks and balances in place to see that the errors occurring are mental errors and not intentional errors. Stern is in jeopardy of losing the fan base he has worked so hard to build. It is not just the Celtics who are crying foul, which leads the the question of possible point spread adjustments? I am not accusing, I am just saying that there doesn't seem to be any transparent control over the referees.