The page mentions they have both hinted and unhinted files you can use... but they recommend only using them for Windows where users prefer that look. (You clearly do.) I'm guessing you're using the unhinted one?
I downloaded the zip, both the unhinted and hinted files looks the same in the font previewer at least. Compared to Segoe UI both look quite blurry.
So I compared the lower-case alphabet in Wordpad (in Word all fonts look shit, way to go MS), and it seems the hinting is only applied to first four letters of the alphabet.
The page mentions they have both hinted and unhinted files you can use... but they recommend only using them for Windows where users prefer that look. (You clearly do.) I'm guessing you're using the unhinted one?