Hi! I am about to install a 120 gb SSD into my old MBP superdrive slot. Right now I have a 750 gb HDD and I am not doing this to et more space, I roughly use the half of the HDD, although for boost performance. However, I really do not know if it will be wise create a fusion drive unit. I think in relation of the confort it is the best solution, you only see one unid and the system handles all management details. Yet, I have been reading some forum post, here and there, about people having problems in their fusion drives after some months of create it. Besides, seems that the battery life drops considerably. For that reason I am considering manage the storage by myself using symbolic links and store the large and briefly used media files in the hdd and system and apps in the SSD. Like in this configuration: http://mattgemmell.com/using-os-x-with-an-ssd-plus-hdd-setup/ Anyhow, can anyone tell me their experience in a MBP with a fusion drive? Thanks!