Pros: This drive does improve performance. Here's my results with a clean install and about 15GB of programs installed. Startup: 22 seconds Deep sleep wake: 16 seconds Photoshop CS4: 3 seconds Firefox: 2 seconds Word 2011: 1 second

Cons: 4 stars because the drive came with the 1.1 firmware. Unfortunately, this firmware version was not compatible with deep sleep (and would force a reboot after waking). The 2.0 firmware seemed to fix this issue but I had to flash it with a Windows machine since no OSX tool is available. If you don't have access to Windows, you'll have to RMA the drive to get it flashed. Definitely fast, but not as fast as I had hoped.

Overall Review: I'm using this drive on a 13" Macbook Pro with 2.26Ghz Core 2 Duo, 4GB DDR3 ram, OSX 10.6.5.

Pros: Replaced 2GB DDR3 with this. Not so sluggish when running lots of programs. Took about 5 minutes to install.

Cons: None.