I just upgraded my SSD from Kingston V300 SSD (no issues, but wanted a faster drive), and replaced it with Crucial MX100. I put a Crucial BX100 in my 2012 MBP and it reads/writes faster than MX. Both have about 250 GBs space. I used CCC for both, so I am a bit stumped. Black magic read/write test for MX was about 257.6/266.3, and on MBP the BX was reading at about 360.2/520. Boot time is around 15 to 20 seconds on Mac Pro (15 seconds or less on MBP), but that read/write speed has me a bit concerned. I am thinking of returning and getting another BX100 for Mac Pro. Any ideas? Thanks.