HDD: Simple. 1 screw and the hdd comes out, another 4 screws to put the new drive in the cage.
RAM: 1 stick on the bottom, requires 1 screw to be removed. 1 stick on inside requires 4 keyboard screws be removed, and the keyboard cable unplugged.
I could easily swap out the hdd and both sticks of RAM in under 5 minutes.