I've done it. I finished the Harry Potter series a few days ago. I first picked up Harry Potter many years ago because may daughter was a fan and I wanted to see if it was OK to let her read the books. At that time there was a great deal of passion from some Evangelical circles condemning the books because they were about wizards and witches.
After reading the first book I was convinced that if one were to be consistent in condemning the Potter books, that individual should also condemn the Wizard of Oz, I dream of Genie, Bewitched, The Chronicles of Narnia and the Lord of the Rings, all of which contain witches, wizards and/or magic. Anti-Potter Evangelicals came out of that looking like goofs. I am sure most of those that condemned these books had never picked up a copy, much less read it.
I am happy to say that I know many conservative Christians, like me, who have greatly enjoyed J.K. Rowling's books in this series. I thing Rowling's is a great writer and the books are lots of fun. The first books are clearly children's books, but the books mature with the characters in the books as they grow into adults.
I don't read much fiction. Works of history, theology science, etc... are more to my tastes, but I did throughly enjoy these seven books. Evangelicals need to stop being lemmings and use their brains and check things out before condemning books like Potter.