Back in 2010, it took me 3 replacement to get a 2010 15" MBP that was flawless. Now in 2013, I got a rMBP and it looked to be a flawless rMBP until I noticed the fans or the speakers are defective. I'm getting a replacement but I'm not impressed that in 2013 I still have to go threw multiple units to get a flawless rMBP. I hope I get a Samsung screen + SSD again because it was really amazing.