I paid the full price for it (€199), and I've found it to be a worthwhile purchase. It's pay-once-use-forever and since I spend a lot of time staring at code, the price per day of use is very low. Of course, there are free fonts that do the same and look good, I used Iosevka and Fira Code before I found PragmataPro. Honestly, I just adore how the font looks, and that was the primary reason I bought it, the others being the amount of available characters and that the author is a paid professional working on it.

The thing that made the difference for me is the hinting, it's an absolute game changer on lower resolution screens.

An alternative that looks a lot like this one is Iosevka[0].

My favorite programming fonts are PragmataPro, Iosevka and Jetbrains Mono. In that order. I used to use PragmataPro for everything, but I use Iosevka for everything but my IDE these days.

[0]: https://typeof.net/Iosevka/

It's $19 if you just pick the regular weight desktop version.