Since the installation of 8 GB, I feel I have another computer in your hands!
-iTunes Starts in 4 seconds or less (before it was over 20 seconds)
-Messages Launches almost instantly
-The Web browsing is very fluid over the slowdown now instant open Top Sites or the sidebar bookmarks and Reading List
-No Slowdowns during heavy use (multitasking)
-The Image processing (Gimp) is much smoother ...
That's positive, I do not regret my purchase!
Small precision: 1066 Mhz and 1067 Mhz are identical (Apple rounds to the higher frequency, Corsair and other brands to the bottom)
Kind regards