I have 2008 macbook 2.4G 4G ram with a 500G 7200rpm drive and just moved to a 2010 2.66G 8G ram and 500G SSD. (Main purpose of the upgrade was to get the extra 4G of ram to run multiple virtual machines.) I'm very impressed, battery life is a lot better than the 2008 13" and so far the only test (beyond a quick Xbench) was a startup test between the two notebooks. From pressing the power on till I get the login screen the numbers are: 2010 w/ SSD - 26.9 seconds 2008 w/ 7200 drive - 1:22 (one minute 22 seconds) Notes: I have a bunch of services in LaunchAgent, etc so your results may vary. Also I did a time machine restore to get the new notebook populated which should make them mostly equal (I don't see anything missing). I'm going to test the launch time of some of the apps but right now everything seems scary fast. Last year we upgraded my wife's Air to the SDD version and it was amazing how it made the previously ok notebook into something that she's really happy with. (Also note that the upgrade also included going from PATA -> SATA so that may also effect performance). I was on the fence about jumping to the i5 15" and have in the past had 15 and 17 inch notebooks (from my windows days) but am very happy with how this notebook runs.