Cursed Child spoilers that aren't really spoilers.
When I first heard that an 8th book was happening I was beyond elated. Reading that "19 years later" at the end of Deathly Hallows left me angry. Because I wanted more. I remember thinking "she should have written another book, what is this epilogue crap". And more I got, although not in the way I wanted. The rumors that weren't really rumors aretrue. The book is a script of the play that was performed in London. It is not an actual novel, that was the most disappointing part for me. Once I got past that, once I was able to go back to visualizing the characters, I found myself speeding through the book. Whatever J. K. Rowling touches, it is spun gold. Following the trio 19 years later, meeting the cursed child, my eyes flew across the page and transported me back to the days I would curl up on the couch and not move until the book was done. My have I missed those days. The hardest part for me was realizing that this is actually the end. That anything else, should it happen, that is Rowlings Magic related, will be in the form of a spinoff. And it's left me as heartbroken as the day I finished Deathly Hallows. However, every and all spinoffs that should happen shall be consumed eagerly by me. The magic will always live on. Always.
If you were apprehensive about reading it because you aren't sure if it'll ruin the series for you, read it anyway. No one will do you justice like the form of Rowlings writing style. And you REALLY don't want to know what happens when you accidentally read spoilers. Read it. Read it. Read it.