I have no idea how I feel about this book

I have no idea how I feel about this book. If the amazing Agatha Christie mysteries had a love child with the movie Groundhog Day who was then raised by The Hunger Games (books of course) I think you would end up with the book. The mystery was just mind-blowing and spot on - one of the best mysteries I have read in a long while. The concept of how it was solved was mind-blowing and completely original. The world in which it took place was also mind-blowing and immensely thought provoking. But, as I read I found myself confused. A lot. I was also a bit bored through the middle. Then I felt a bit rushed at the end. And ultimately I was bummed that I didn't find out the conclusions or back stories for the main characters. So throughout the book I pinged back and forth through a 1 star rating all the way up to a five star rating. So where do I land? I'm just not sure. Were the flaws of this book mine? Did I miss a lot of detail and the natural rhythm of the story because I could only read it in short little bits? Maybe. Or were the flaws of the book the author's? I just don't know. I will say though - if you love a good twisty mystery with lots of red-herrings and plenty of misdirection - this is totally the book for you.