Very good, but needs a option for resizing. I've tried looking at monospaced fonts and couldn't see them at a size that a monospaced font would actually be used (default is huge).
You can select a size for a given font by hovering over it to reveal the size slider and other options (desktop version at least), and then applying the size to all.
The font size slider is incredibly annoying. There should at least be a field to manually input a size as well. Having fonts jump from 8px - 22px with no space between is useless.
