Thanks for bumping this thread!
My experience wasn't very good at all. It took Stern 13 months to replace my GBLE playfield. I had several ghosting inserts and chipped clear in the shooter lane.
Unfortunately, my new playfield has a ghosting insert as well. So far it hasn't spread but I imagine I'll be back in the same position in a few months.
Needless to say, my latest NIB purchase was a TNA by Spooky. QC issues are one thing but taking 13 months to resolve an issue by giving me another bad playfield isn't acceptable to me.