Always nice to see some new programming font options! One thing that stood out to me is the space between a lowercase a and the text that follows. The gap feels a little awkward to me.

I really like the numerals, and the options for different asterisk vertical positions and zero characters. Consecutive underscores are also nicely spaced.

One odd thing, if you visit the preview interface — http://input.fontbureau.com/preview/ — and swap out the letter forms, it seems that some characters are different widths. For example, changing the 'a' letter form to the alternate makes lines with a's in them smaller. This could very well just be a browser thing, trying to auto-kern monospaced letters for some reason, although it's doing it in both Chrome and Firefox.

Edit: oh, then I read some more. That's a feature. Huh. The future is weird.