This was easily the best game I've played this year, and might even be better than most of what I played last year. The way they mixed 3 different mediums of storytelling into one seamless, cohesive and engaging package is something that should be applauded above anything else that's going on in this industry right now.
I dislike TV shows in general for the most part (especially modern ones) but Quantum Break's episodes didn't feel like TV shows, they felt like a real part of the game that let you take a short break from controlling Jack and have some time to see what was going on from the opposite point of view and getting immersed into the "villain's" side of the story in a different way than you do Jack's.
All the things you can read in the game contribute some HUGE and important plot points that fill in the gaps that the gameplay and TV show don't cover, and they were really fun, humorous, and well-written, almost like a book or a comic. I loved how interesting they made these reading documents, in the same way they did with Alan Wake.
I was compelled by the story from start to finish and the game still took me 12-13 hours just to finish one play-through since I was actually taking the time to explore and getting immersed in the world. The well-researched scientific ideas and theories based on the real things scientists know and are working on in the world today was so refreshing to see and really contributed to the story's authenticity to someone like me who comes from things like Star Trek or real-world science.
It seems most people (including reviewers) who played it were more concerned about rushing through it as quickly as possible and skipping all the live action episodes so they could get online and complain about how short it was (after skipping literally half of the game and the story.)
That's another thing that many people already stated in this thread too, is that a good chunk of the reviews were an absolute joke that wasn't even critiquing anything besides the length of the game and how "bad" the cover system was, when you weren't supposed to be relying on cover in the first place, but that's a whole other discussion that's already been done ad nauseam.
I can't wait to see if they expand this with more DLC or a sequel, and Remedy generally always delivers.
Here's just a few of my personal screen shots I took while playing: