Here is my thread regarding an Intel 520 Series SSD. http://forums.macrumors.com/showthread.php?t=1350803 The 520 doesn't work at all on my Late 2008 MBP. I am starting a new thread to get feedback as to what brand/model SSD I can try instead - one that will work without problems on my 2008 MBP. I've heard the Crucial M4 is one that works - is that correct? I'm wondering if that's the route I need to take? Any help would be greatly appreciated - thanks!