Without problems (almost!)

Problems during installation:
Had done for the first time itself: Despite Tutorial Video there 4x recognition problems (!).
I had not been enough and pushed a wrong chip in the holder.
After the fifth and final rausnehmen pushing it worked.
So for all the firstfruits not give up easily!

Problems with the RAM chips: no; started, recognized work.
The difference is dramatic.
Photoshop runs 3-4x faster than before, which makes editing much more productive.
iPhoto opens and operates much faster (2-3 times), Mail will open a flash.
Also, I can finally between Photoshop (with multiple open documents) and Firefox switch (with many open tabs) absolutely without delay, (more for 6 (!) Programs are running).

'm Very happy with the purchase.
8GB RAM make my time more productively a lot at the computer, so I have more time to do anything else,
unnecessary to sit long before the screen.

Mac owners should the manufacturer still prefer to buy the Mac RAM chips that have been optimized for Mac,
but be sure to pay attention to the compatibility with your model:
; Qid = 1348433053 & sr = 8-5
I thought too late to the Mac RAM chips and am glad that this model still works.

By the way, a guide is available on YouTube, in which the Macbook enclosed booklet and here:
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