Hello Bill,

I haven't tried out Myriad's PDF to MusicXML product, but I suspect it's pretty good, because Michael Good, the designer of MusicXML itself, resells just a few chosen MusicXML-capable products at his web site: his own Dolet plug-ins for Finale and Siblieus import/export of MusicXML, PDF to MusicXML by Myriad, a few others, and, of course, Notation Composer ;-)

Michael really likes Notation's MIDI-to-notation transcription, the preferred gateway from MIDI to notation or MusicXML.

Cheers
-- Mark