I read all the other reviews on here for this product and thought "it can't possibly be that easy". But it is. The work of a couple of minutes on my Samsung NC10.
Just unplug, remove battery, unscrew the small panel on the bottom of the computer, slot out the existing card, slot in the new one. And that's it. Done.
I had approached this with a fair amount of trepidation as I know nothing about computers. I freshly backed up my system on an external drive in case it all went bent. But it didn't. Great. And SOOOOO cheap.