Last night, I finally got my OWC 40gig SSD dispite UPS's valiant attempt to loose it. It only arrived 3 days late. Ill never pay for 2nd day shipping again . Anyway. I purchased it with a 3.5" case so I could use it in one of my empty drive bays on my 2009 Mac Pro. The phisical installation took me less than 3 minutes. My Mac pro only has two other internal HDDs. One is the 640gig system drive that came with it, and a 250gig drive I use for a Final Cut Express Scratch drive. I also have a 1t external drive I use for Time Machine backups. In preparation for the installation, I removed a bunch of old applications I was not using very often. I then had to clear off my Final Cut Express scratch drive to make room for my user folder. It took nearly an hour to copy my 200gig user folder over to the scratch drive. I then pointed the system to the new user folder. I then used the restore disk that came with my Mac Pro to do a clean install of OSX on my SSD. In about a half hours time, I had a fresh install of OSX, along with my applications on the new SSD. The new system also picked up all my user settings from the user folder on the scratch drive, but didn't try to move the folder. In the end, my system install with applications came to 17gigs. After I got the new system setup, I reset the user folder desination back to the orignal user folder on my 640g hdd. I then restored my Final Cut drive using my time machine back up. So far, I have been impressed with the performance of the ssd. The boot time is alot faster, and applications launches are almost instant. It was a very good upgrade for $140.