Hi, I recently bought an optibay enclosure and a SATA 3 128GB Kingston SSD to replace my main hard drive in my mid-2009 macbook pro. I first installed the SSD Into the optibay, cloned with superduper, and set to default boot drive. This worked very fast once it actually booted into the OS, but starting up was actually slower than my normal HD. So I swapped them around with the SSD in the main bay which made it boot EXTREMELY slowly and run almost unresponsively once inside the OS. Could this be a compatibility issue with the fact that its sata 3? I have tried resetting the PRAM and all that, also it was formatted as Mac OS Journaled before cloning. I dont understand why It works fine in the optibay but is terribly unresponsive in the main bay? It is worth noting that my original sata drive works fine in the main bay. Any ideas? Thanks!