I just upgraded mine from 16GB to 32GB. The only problem with this guide is that it says the difficulty is moderate. What could be easier? It took me less than five minutes, and most of that was unplugging/replugging stuff before and after the actual RAM upgrade.
I used a screwdriver to push on the little button that opens the door, as I didn't have a spudger handy.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.