[quicksilver03]

Apart from the non-programmers bit, you're not wrong.

I've been using the open source version on a project between 2013 and 2015 and it was exactly as you described: it essentially was a very convoluted and un-debuggable way of attacking a class of trivial problems, on which it failed miserably.

Basic functionality (watch a directory for incoming files, apply some processing, move the files to a second directory) would fail without any useful error message. You could "program" it by writing XML files with an Eclipse plugin, but anything non-trivial would involve hundreds of lines of "magic" XML.

I consider myself lucky enough to have moved on.