Quoted from RobT:Really?
I have definitely been the beneficiary of a "useless" 30 day warranty from Stern. Had to have the main board on my MET replaced. Free of charge.
May be his point was that Stern might help you no matter what.
I had a faulty MPU board on my WPT that was replaced free of charge 5 years after the game was built and sold to its first user, in a different country!
(It was a known problem - there was a service bulletin about that issue)