Oh great... you just had to go there! Now we're all gonna get a lesson on Pete Walker and Quad amps!
I know
@lovinthehd went a couple of rounds with AC4L but I dunno if he had to invoke the extended warranty. I think he did get 2 lemons tho before giving up and buying new... I have been told there might be some stuff in the fine print of that extended warranty that possibly muddies up the return process too, but I haven't looked through it.
What I've never heard is anyone being abandoned or refused warranty service from them. From my perspective it's worth rolling the dice for the money saved, hundreds of dollars, if the worst case scenario is that I might have jump through a couple of hoops to get my refund or replacement.