Okay. So this book. 
First, I saw the twist come right away. That's not a bad thing, but it was super predictable. By the end of the third chapter I knew what the twist was. This is because if you're familiar with the plot line and have seen any movie or read a book with the same plot line, it is super obvious.

The writing was a bit everywhere. You would have fourth wall breaks and the character was such a Nice Guy TM that he wasn't lovable, just okay most of the time and a dick the rest of the time.

I will say, the last line saved this book from being rated a 2.75. It did still the ending from <spoilers>Inception, where you don't know if they made it out or not</spoilers>, but it made sense and worked for the ending of this novel.

The last thing I'm going to say is that this dude didn't do any research into schizophrenia, dissociative identity disorder (used to be referred to as multiple personality disorder, and is referred to as that in the book), and bipolar disorder. It's super obvious in how he writes <spoilers>the delusions and how long they last, plus what having multiple identities actually is like and how it works</spoilers> that he did no research. I mean if you're going to have those featured in your novel, you walk the extremally fine line of misrepresentation. This novel stepped about five steps over that line.

I originally picked it up since I thought it was a cool concept, I liked how it reminded me of the show Superstore, but I'd skip out on this one.