It looks great actually! What kills ,e about Microsoft though is that, especially recently, they've done a great job in making their sites, OS, and software quite pretty but they still after all this time have absolutely horrendous font rendering in Windows which kills every design they come out with. I'm a developer who uses a Mac as my primary machine, Linux as a secondary machine and in the past month has been forced to use Windows at my new job. I wasn't happy about it but it turns out I've gotten just about as productive with it as any other platform. But the problem is that now, 4 weeks in, I get terrible eye strain and the whole system looks ugly because fonts are jagged except at really large sizes. It's ironic that this new site looks awesome on my iPad and Mac but not so much on their own OS, Windows. Why can't they fix that already?
This is intentional. Windows uses font hinting which attempts to align the anti-aliased font to whole pixels vertically and sub-pixels horizontally. This is done to maintain readability at small sizes. Apple doesn't use this type of font hinting and applies sub-pixel anti-aliasing proportionately.
AFAIK there is no way in Windows to control hinting, which in my opinion is the thing that makes Windows' font-rendering unbearable, especially on displays with a high PPI count.
There's hacks out there, but they're exactly that: hacks. And they don't always work that well.