Hello, I ordered a 13" MBP 2.53 a week ago, but it has not been shipped yet. Now I have read about serious problems with the new MacBook Pros (13" and 15" only) concerning SATA II and third party drives in many forums, such as the Apple Support forum and the OCZ forum: http://discussions.apple.com/thread.jspa?threadID=2054387&start=0&tstart=0 http://www.ocztechnologyforum.com/forum/showthread.php?t=57617 As I understand it, the first mid 2009 MacBook Pros supported SATA I speeds only. After many user complaints, Apple addressed the issue with a firmware update, but it seems the MBPs hardware has a problem with full SATA II speeds since many users reported issues with 3rd party drives after the firmware update. Apple's answer so far seems to be that 3rd party drives and SATA II are not supported officially. Since I want to use a 3rd party SSD (such as OCZ) with SATA II later, I wonder whether I should cancel my order until Apple resolves these issues. Now my question is: Who of you uses a third party drive (7200 RPM or SSD) with a SATA II interface running at 3GBit/s with either the 13" or 15" mid 2009 MacBook Pros? Do you experience the problems mentioned in the threads above? Thank you very much for your help, Matthias.