Quoted from vireland:
Stern's been on balance very good for support on the machines we've bought (probably close to 2 dozen now). Just today I got warranty support for an Iron Maiden Prem where both newton balls had come loose off the post they're pressed to (the lower one came clean off). I was expecting to have to buy them since it was just a little over a year old, but they took care of it.
Playfield clear bunching on that same Maiden wasn't deemed bad enough for a replacement when I emailed about it last year, though.
What about now though? The chipping looks pretty bad to me. If you had already emailed them last year to document the problem I would argue this should be covered since the concern was raised during the warranty period. If you don't mind me asking roughly how many plays before it chipped off? The reason I ask is I have an Iron Maiden with pooling that has about 500 plays on it. Nothing has chipped yet and the pooling looks the same as when I first noticed it.