This is one of those books that can be entertaining as long as you aren't looking for some great work of fiction. The writing was decent, the world building wasn't the greatest, and the characters were fairly well done. The characters are what held me to this book, having good characters can make even the worst novel bearable for me.
This wasn't the greatest novel so I won't spend too much time on it, but I did want to hit a couple points.
For one, the idea of a teenager outcast who gains supernatural powers is far from original. Although the supernatural entity that our protag turns out to be is original, at least to me, I've never read a book where the hero is an Incubus. I'm still not sure how I feel about the hero being a soul sucking demon. But I guess if vampires can be heroes we should let Incubuses have a chance at the lime light too.
On a whole the book had a shallow feel to it, and there was no clear cut story arc, toward the end some vampires kidnapped his father and he had to mount a rescue, but that only happened in the last hour of reading.
On a whole it wasn't that bad, if you're someone who likes a book with a lot of teenage love/angst drama, this might be a good one for you. For me it was entertaining, and since I've been in such a horrible slump lately I was able to overlook a few issues to enjoy this book.