Okay, I'm back to write my review. :-) I think my biggest issue with this is that it felt unnecessary. I'm a HP fan, but it's not one of my primary fandoms, so I wasn't as jazzed about returning to the HP universe as some people. The fact that this return is in a new format (play), focused primarily on new characters, with the old characters that appear acting in pretty uncharacteristic ways, makes it feel like even more of a tacked-on afterthought than a worthwhile entry in the HP series in its own right. I agree with the reviewers who say that the older characters, particularly Harry, are out-of-character. Maybe this would've worked better if it struck out for new territory, with Scorpius and Albus as the leaders of the new HP generation and the Harry/Hermione/Ron trifecta as background characters ... but instead, this seemed to be asking the question, "How can we reference/replay as many scenes and events from the existing series as possible?" It was basically a clip show with the Time Turner as the excuse for stringing together old scenes and bringing back old characters, and as anyone who's watched TV knows, clip shows are usually the weakest episode of the season. They're filler. 
 (view spoiler)[Honestly, an entire star in my rating is just because I got to spend a little more time with Snape - otherwise, I would've rated this lower. (hide spoiler)] 
 2016 reading challenge: a play