First i know im going to be depicted as that person that we all hate but i went ahead and bought a second Late 13inch macbook pro retina i5/8gb/256/intel 5100. This was was going to be a gift to my brother for his birthday. When i received the macbook one of the first things i did was check the ssd manufacturer and it read sandisk. First off some people are fine with the sandisk controller but im not. I have owned a plenty of samsung ssd's and not one of them has ever crapped out on me. Currently Running 4 840 pro in pegasus r4 in raid 5 and there as fast as day one. Even my intial samsung 470 is running tip top in a 2008 imac to this day. But that one sandisk ridden ssd i had crapped out on me so hard back in 2011 that i banished that brand from ever being housed in 1 of my computers. Has anyone gone through this? i drove all over l.a today to 3 different apple stores to not seem so shady with my exchanges. even tho going to a different store every time makes it all that more shaddier. 1 of the 3 sandisk ssd's today was reading 400 write and 600 read which was total horse **** compared to the 750 read and writes im getting in my samsung one. I can easily tell the difference if im loading or offloading big project to my external raid by thunderbolt.