Choosing a Font for Vim

Unclear difference in appearance between 1 with l, 0 with O can be a source of inconvenience for computer users. This summer, I've found this site informative, but I quickly forgot it.
Installation of many fonts in some popular Linux distributions can be done in GUI just like Win*, so I attempted to change my default font on Vim, and a picture is worth a thousand words.
The following command from Vim Tips Wikia will do: :set guifont=[font-name]:h[font-size]. (Escape the whitespace character with a backslash, i.e. use \ to represent a whitespace.)

gVim with Inconsolata 12pt