Having watched Quick for nearly his whole professional career, I've noticed he plays his best when he stays further back in the net, and doesn't challenge shooters as much (which is the opposite of most goalies).
His play has been somewhat up & down over the past couple seasons. Too often he would over exert himself, try too hard, come too far out of the net ect. I think, in part, because he was feeling the pressure of the new contract, and trying to live up to the accolades that had been bestowed on him.
Right now, he's playing relaxed, and that's a good sign. If he keeps it up, he'll be a Vezina candidate and the Kings will be extremely difficult to beat in a 7 game series.
