One should not expect miracles, but the boot process is felt 50% faster and the program start faster, by the recovered disk space I'm super happy with the solution, as a pure SSD solution, the whole thing would become much more expensive. Simply old plate out, new pure and the content of the old to the new clone. All I've done with OSX 10.8.4. To connect the old drive via USB to your Mac I took ICY BOX IB-AC603. I have cloned the utility of OSX 10.8.4.