All the glyphs are designed to be used at very low sizes and TrueType hand hinted for better view in every OSs.
Since version 0.821
PragmataPro now with Math Serif symbols!
And if you select Open Type Stylistic Set 08-10 using PragmataPro 0.819 you’ll see standard Sans Serif letters transforming magically in Serifed letters. Enjoy!