I've got a pretty good rapport with my dealer and because I can get very persuasive very quickly - without getting offensive - by knowing which questions to ask - i.e. ones they do not want to answer - I've had no problem convincing my dealer to do right by me.
I hope I never have to use my extended warranty - but I know I'll not hesitate if I need to.
At 87,000+ on the clock, and after a warranty-covered new CKP sensor install, she's purring like herself.
Best of luck,
Steve