You always have to applaud any league or entity trying to make themselves better by installing checks and balances. The NBA implementing the instant replay system back in 2002 was just that. Gone are the days of a questionable last-second shot going the wrong way, or a deflection on a deciding play getting missed without refs taking a second look. It's not fool proof, but it's a great tool to show that the NBA is willing to better itself.
The implementation of instant replay means less calls are blown.