Elliot is the true definition of an unreliable narrator.
 
At the beginning of the book the direct to reader narrative style really got on my nerves - 'Where was I?' etc. and so many references to the fact that the narrator is narrating. It's pretentious, embarrassing, and awkward. HOWEVER, it soon became very obvious that Michaelides did this to make us hate Elliot, and job well fucking done. 
 
It was so fucking disturbing how Elliot talked about Lana and put so many words into her mouth. I'm not sure I've ever been so disgusted by a character before, and read so many unravelling layers of deception and insanity. What a psychopathic, self-centred creep.

 
 
The ending of the book didn't quite live up to what I was hoping for

(it was obvious Elliot was going to murder Lara)

. But, it was a quick and disturbing read, and I did have a good reading experience.