It looks to me too thin for an unhinted font. Its lines look like they're trying to be one pixel wide, and failing. Fonts can go much thinner when they match up with the pixel grid; as an example, here's 14pt Andale Mono on Windows 8 with antialiasing off: http://www.quadruple-a.com/tmp/AndaleMono.png

The lightest weight on the page does seem way too thin, but the heavier face above it looks great to me.