If you're talking about AGFAPHOTO (and NOT Agfapan )APX 100 - I used to use it all the time. It is widely believed to be repackaged Kentmere 100. Either way, it's fantastic stuff. It used to be drugstore film in a few countries here in the EU and was widely available and extremely cheap. For example I saw it in Germany sold for 4 Euro or so until a couple of years ago. Unbeatable at that price. Now it's shot up to almost double that on the high street, so it makes more sense to just buy bulk Kentmere 100 or Foma 100/200 from online retailers.
Solid stuff, sadly the naming backfired a bit, because whenever it gets mentioned online someone will attempt to draw a comparison with the 'old/legendary' AgfaPAN 100. I wasn't around when that film was popular so the comparison is meaningless to me. All I know is that I enjoy Agfaphoto APX 100.
Here's a couple of negative scans. I don't use or know Pyro I'm afraid, but I like how the film looks in my (linear, flat, raw) negative scanning workflow using sulphite developers (D76 1+1) and Rodinal 1:50 regularly inverted (
not stand,
not semistand)
Agfaphoto APX 100 in an Olympus OM2n + Zuiko 28mm f/2.8 (if I remember correctly)