Not everyone is particularly happy about the drama format. I for one would have preferred flowing, continuous prose. But despite this deficiency, the book manages to churn out some top class twists and ends that is typical of J K Rowling's style. It should be noted that while much of the story revolves around the children of Harry Potter and Draco Malfoy, the spotlight, once again is on Harry Potter.
It's a fine story. Not as great as the original Harry Potter books, but certainly a must read for the Harry Potter fandom.