My parents have a standard WOZ that I sold them and I have a RR WOZ that I bought NIB with a play field protector already installed. I don't notice any game play difference between the two games but debris gets between the protector and the play field and it just doesn't look quite as nice in some areas as a sweet clear coat. Also, the ball has gotten hung up a few times due to the protector. I guess I would say I am neutral to negative on them. I have since bought NIB DI LE and NIB JJPOTC LE without protectors if that tells you anything.