I couldn't pass up the awesome deal at NewEgg for 4GB of RAM for only $110 after $40 mail-in rebate! Apple charges $700 for the same upgrade!! The GeIL 4GB Dual Channel Kit received great customer reviews on NewEgg so I felt confident purchasing it. Installing it myself was a breeze. Apple provides directions for upgrading your memory on their website and if you need something more visual, there are videos on YouTube showing how its done.
My MacBook Pro runs a lot better now with the extra memory. I usually have Windows XP running inside VMWare so the memory was really being eaten up quick. Also, having the newer Santa Rosa MacBook Pro is great because the full 4GB is utilized, instead of only 3GB.