I just got the extra 2 GB of memory for the Mac. It took me all of 2 minutes to install, and that mainly because I had to look for a pair of scissors to open the envelope it came in. Other than that, it was fast, easy, and required no tools - just what I would have expected from Apple. indeed, the whole thing would have been simplicity itself had it not been for the first vendor I went to not returning my calls to customer service, so I finally gave up and ordered from someone else and got it with no hassles.
I don't expect this thing to ever have to swap to disk unless I'm abusing the hell out of it. That will make the already quick machine that much quicker.