There is no magic bullet. Real music has passing notes, leading basslines, transitional chords and much much more that stops it from being linear in nature. There is no software anywhere that is capable of analyzing all this, removing the transitional stuff, and making a style directly from MIDI, unless the tune is so simple it has none.

So, you end up doing as much editing as if you had done it all yourself. And add to that, most arrangers have ways of taking MIDI chunks and assembling them into styles already.

Sadly, it is boondoggle. Sold to gullible buyers who don't realize how difficult what it says it can do actually is.