The only good thing about this service is the quality of the English speaking voices, other that it doesn't work well at all. It can't deal with apostrophes, truncated words or dates. Converting a pdf makes the text jump all over the place and cut off words, god forbid there is an indent in the text. I have a free text to speech that, albeit having a robotic voice, handles the actual reading better, which is the most important thing at the end of the day. I would only use this if I was paid to.