I'm so torn on the issue. I really like the human element on the game, very well knowing that there will be some missed calls throughout the seasons, but lately so many game-changing calls are being messed up. I just don't like the idea of slowing down the game to do the replays, delaying all action like in football. I have to agree with Optimist, that unless these umps improve their performance, instant replay will be needed to stop the game from being decided by a blown call.