My favourite monospaced font is Triplicate https://practicaltypography.com/triplicate.html >: the only true serif monospace that I know of (though I have a vague feeling I found one other at some point). Every other serif monospace I know of is a slab serif. Triplicate’s variable stroke thickness is also exceedingly rare in monospaced fonts; almost everyone goes for uniform stroke thickness, as is customary with sans…
This looks very nice, but I can't pay that much for a coding font like this simply because until you load it into the various pieces of software you use it is impossible to know how it will render. Especially on a non-hidpi screen. Chances are it will look significantly different than the PDF once you load it into your terminal. Each of the three terminal emulators I have installed already render fonts very different…
As for the customer service experience, the author himself has responded (within the day even) to a couple of emails when I had questions about licensing.