[quote name='maingon']I like them alot, cheap and when you buy a game you get alot of extras, for example, might get the soundtrack, manual, art of book, wallpaper, etc[/QUOTE]
It's all DRM free and you don't have to be online to play or anything, no client, just download the installer and install and play.
That's it.
GOG is great for some games that dont' play happy in Vista or even XP.
And everything is at a good price point, constantly adding games.