Just another anecdotal datapoint: I've tried to do that both in Switzerland and Japan, and they wouldn't replace adapters I brought with broken down cable shielding.
JP here too. This was in ~2011, the staff then Really Liked Macs. Now it's the "my iPhone screen broke" bar, and they have way more staff.
The service for my Mac last time was actually pretty hideous. I can't remember what he said, but he used some amazing jargon to explain the difficult act of booting off an OS on a USB hard disk. Then tried to say that the broken hinge (the hinge part of the stand on 2014 skinny iMacs is prone to fail without warning, tipping the screen forward) and bad RAM on my iMac might not be covered under Applecare (it was).
The genius bar has never been a fun experience (our sensors indicate you used your laptop! Sorry, but Applecare doesn't cover oxygen damage), but that was super unpleasant.
I also had very mixed experience. In Switzerland I now avoid them like the plague and I go to certified service partners instead. Problem there is that there's always an issue, like screws not sitting tight and falling out after service, or some non essential component not being reconnected again, like keyboard backlight.
Lately my position on Apple is: I buy their iPhones and their iMacs. One has comparatively good service, the other rarely needs service because it isn't carried around and doesn't contain a battery. For laptops I was hoping that Windows 10 tablets would be any good, but was severely disappointed again, especially by the software side, Windows is a total mess. Right now I'm at a loss at what my next portable computer is supposed to be. Maybe Lenovos upcoming classic thinkpad line with Ubuntu?
I have been dual booting Ubuntu for awhile now on my Macbook.
Unless Apple comes out with something really special this year (early 2011 13" MBP → late 2013 13" Retina MBP was an impressive upgrade), I am considering building a Linux desktop and a pairing it with a really nice monitor. 1TB SSD is only $400 now, which seems like a really nice deal compared to even last year.
I'll keep my Macbook around for using Adobe apps, I guess. Other than that I can't think of a pressing reason to stay on OSX.
tip: call apple and tell them you have a cord that looks like it's a serious fire hazard. Each time I've said "fire hazard," they've replaced it without question.
The service for my Mac last time was actually pretty hideous. I can't remember what he said, but he used some amazing jargon to explain the difficult act of booting off an OS on a USB hard disk. Then tried to say that the broken hinge (the hinge part of the stand on 2014 skinny iMacs is prone to fail without warning, tipping the screen forward) and bad RAM on my iMac might not be covered under Applecare (it was).
The genius bar has never been a fun experience (our sensors indicate you used your laptop! Sorry, but Applecare doesn't cover oxygen damage), but that was super unpleasant.