Wow, I've owned three MBPs, one MB, one Mac Pro, one iMac, about 10 iPhones and still own 5, and i have only had to return one iPhone. I've always been extremely impressed with Apples quality control.
That's what drew me to Apple years ago. Great design, functionality & quality control. I bought ten new PowerBooks, one each time the new models were released. Each of them was excellent.
I've not had to return any Apple product until my first MacBook Pro in 2006 (overheating). This year each of the MacBook Pros I ordered had either dents, or scratches in excess of 25mm long. Normally one might call this a problem. I did'nt see it that way. A problem is something you can do something about. But that is not the case as only Apple could (but won't) so it's just a fact of life. It's up to the customer to spend their time and money to get what you pay for. It's just how it is.