This is my primary app for reading PDFs for papers I have to read for school. It generally works well for most text with some odd pronunciations here and there. It does poorly on mathematical equations, but if the app does not know how to parse the equation so that it would read it in a mathematically logical with words that would help give context when the equation is not visible rather than just reading characters and symbols this would be a wonderful app. Also reading data in tables in a more natural manner would help a lot.
Ninchi77 about vBookz PDF Voice Reader, v1.9