I was reminded of a recent xkcd comic while installing Inform 7 today: (yellow highlight [poorly] added by me). This is not a knock against Inform’s installer, I’ve noticed it several times lately.
Each time I go “whoah, that’ll use 1/2 of my harddrive… wait a second.” It really would be better if installers could provide some sort of scale to make it more obvious that you are using .05% of your available space, not 53%.