PDF import - has it worked for you?

The Musescore site has a page where you can upload PDF'd scores and it will attempt to convert them to a musescore file. Awesome idea and great time saver when you find a pdf score that you need to edit for your purposes.

I've tried this feature numerous times, with a wide variety of PDF's scores - and not a single one of them has ever worked - ever. All I ever get is an error msg saying my PDF file could not be converted. Has anyone ever got this to work?

(note: I just tried an experiment with a PDF I created in Musescore and it did covert. So maybe it only works if the score was originally created in Musescore? Not a very useful feature if that's the case).

Thanks,
Mark