I hated it. Until I figured out that I'd accidentally de-zoomed my browser and made everything tiny.
Fixed that, and now the only thing that looks different to me is the message at the top asking, "Notice Something Different?"
In all seriousness, though, the fonts do seem to be a bit crisper. But then I've never really been overly font-conscious/sensitive in the first place. It might be that I'm just looking harder at them; 'cause I honestly don't know my serif from a hole-in-the-ground.
