its just a principal. i feel like apple "owes" me a perfect machine if i fork out 1.500€ for it especially since the same thing doesnt occur on my 3,5 year old mbp
Principal? Apple "owes" you something? So that's what naivety is called these days...
Not to bash on you, but: I also have a 13" rMBP ( it's my primary machine ) and if I want to force it, I can get it to ghost ( I actually did this the first day I got it, just for fun ). That being said, I've almost had it for 3 months now and ghosting has not appeared under "normal use", not even once ( I'm mainly doing programming: having the same editor open for hours each day + other stuff going on ). Sure, it might start happening soon, it's something I'm aware of, but bothered? That's what warranty is for...
Also: High price doesn't mean or guarantee "perfect product". You think that each Ferrari or Lamborghini is perfect because of their price tag? You've paid the price of the brand and the possible support that comes along... that's it. If you see it differently, then maybe you shouldn't have gotten that product in the first place ( and the "naivety" part still applies too ).
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I'm going to assume that 0 replies and around 80 views means no one is experiencing these issues?
Ghosting was reported by some users, but considering that the refurbished store is not loaded with retina products, I'll adventure assuming that the models with ghosting problems make up a relatively small % of total sold units and that users facing such issues also got the problem solved ( they either had the screen replaced or were given a new machine OR they are not "hunting" for issues and just simply enjoy their notebook ). Otherwise, I'd really expect the refurbished store to be loaded with retina models...
Then again... if having to maybe take your machine in for a screen replacement / repair is too HUGE of a risk for you, then you're maybe right by not getting one. Otherwise, warranty was invented for a reason... If it's broken ( and you didn't break it ), then they'll fix it ( or at least try to fix it / replace it ).
Not to mentioned that you have a 14 days return period... no questions asked and you get your money back. How many other companies do that? Right...