I just finished reading Harry Potter And The Deathly Hallows, thanks to whoever OCR'd it. The book itself, is not bad compared to the rest of the series. However, just as anybody who is aware of my opinions on this subject will attest, J. K. Rowling, while an authoress with a admirable imagination, is just not very good at writing. All her novels suffer from a hoppitty-jumpitty-skippitty-boom flaws in flow and build-up, and randomly insert new plot elements into already flimsy plots which makes for jarring reading. That said, it is all mildly entertaining.
I'd rate the series a 5/10 for anybody over 16 and an 8/10 for anybody below.