FWIW, I've been using this and I've found it useful
I generally only use it to extract part of the text rather than the whole document but so far it's been fine (though I have found a couple of instances where it couldn't read a document - I've put that down to something flakey in the PDF rather than something in the application)
downside is you get the text sans formatting, so you need to go through and clean it up manually.