[pmontra]

The monospaced font looks very old, I don't like the look of it.

The proportional one is ok but it can't be used for programming. In part because of the reasons you gave but especially because there is almost no gap between the two = characters in == and @ is almost superscripted, which looks wierd.

I'm going back to Sans Regular (whatever it is on Ubuntu). It has its own problems (I and l look the same) but it's still better.

[iainmerrick]

Yes! You put your finger on it -- it looks old!

That's not necessarily a bad thing. Instead of "old" you could call it "retro". But it definitely reminds me of the formatting of K&R, which makes sense as the Go team see themselves as the heirs of the K&R tradition.

[mark-r]

When I saw the monospaced font, I immediately thought "Courier". The differences are subtle, must less pronounced than the similarities. I wonder why they didn't just make a monospaced version of the Sans?