No problems really, I just wanted a machine that booted faster
Great! I replaced the existing 4 gig Ram with Crucial's 8 gig Ram and a replaced the 320 gig HD with a Crucial 256 SSD.
Make sure when you remove the unibody screws you put them back where they came from. You have some longer screws and some shorter ones. ALSO, watch the angle how those screws go in, if your not careful, you could cross thread the little buggers.