To all Seagate Momentus XT users in Macrumors Forums out there: How is your Seagate Momentus XT working so far? I've read from one of the threads that this hybrid HDD/SSD is not good for long term usage. Before I pull my trigger and buy the drive, I want to see if it works fine, slow down, replaced with SSD, etc. I would like some first-hand-opinion about this drive.