I recently bought the new Crucial 128GB SSD but have been wholly unable to get it to work in my MBP. I installed in as the internal drive, booted from the Leopard CD and it didn't recognise the drive. So I formatted the SSD as Mac OS Extended (Journaled) with GUID. It now saw the drive but the install process would then fail at various points. Sometimes it would freeze and fail to install, sometimes it would complete the install but then immediately 'lose' the drive so when it rebooted to complete the process it couldn't see the drive and would boot back into the CD. Holding option on boot at this point did not give me the option of booting from the SSD. I then tried booting from a Carbon Copy Cloner backup and copying that to the SSD. This process worked but when I booted from the SSD, my Mac would freeze up after a minute of two and force me to do a hard reset. Now you might dismiss this as a faulty drive but, for various reasons, I had ordered two of these drives (same drive, different suppliers) and both f them behave exactly the same way. Has anyone else experienced this or something similar. I must have tried installing and formatting and installing at least twenty times in the last day or so, checking through every possibility I can think of but to no avail. With my old HD in the computer is rock solid so there is no issue with the SATA cable etc. I have the mid-2009 15" MBP, 2.53 if that is relevant.