I have a mid 2010 15inch macbook pro that works great. I usually use this for personal use for things such as photos, video editing of family trips, and web browsing. The current RAM i have now is 4gigs which is ok for what I am doing, but my question is if its a major step up or upgrade in speed to 8gigs. I have noticed that it takes longer for me to open programs such as iTunes, iPhoto, and iMovie than before. Will upgrading to say 8 Gs of RAM make a huge difference? Has anyone ever upgraded from 4Gigs or ram to 8Gigs? Was there a huge difference? Any help would be much appreciated.