Its for my 2.16 GHz CD MBP. I have a single 1 GB stick, and need one more. Crucial RAM has a stick for about 70 shipped 2 day Air, any reason not to get this? http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=6DA0A421A5CA7304 Who has the best warrantees (sp)? Looking at Crucial, it says call them if anything happens after 30 days, but it doesn't say they're fix it for free . Anyone with a better recommendation?