Original Link: http://css-tricks.com/why-ems/

I’ve long sized text only in px. Even when it was patently uncool to do so – the days in which smart people cared about the fact that text set in px couldn’t be resized in IE 6-8. I’ve switched over to using ems now. I haven’t moved every single project over yet, but my mind has switched. Why? I finally found some compelling reasons that I now grok.

Interesting Post from Chris Coyier on chooseing ems instead of Px for web fonts…