Quoted from cooked71:+1 for the pause/mute feature. That alone is good enough reason to install it....allows you to "freeze" a flipper up (holding the ball) while you get a beer/go to the toilet/answer a phone call etc. etc.
I still cant work out why all new games dont have this as an option.
There is a setting on Stern pins that allows coin door saver. You open the coin door to 'pause' the game.