I love the characterization in this. Mancusi has a talent for displaying a character's core personality through a few well placed actions and words. For instance, Mason is a Hollywood big-shot who, for all intents and purposes, seems to be the shallow, womanizing, love-em-and-leave-em playboy the tabloids make him out to be. Mancusi could have devoted passages building a counter argument. Instead, she has a few scenes where this manly guy turns to mush over his best friend -- a small dog he rescued and dotes upon. No counter argument needed; anyone who can show that much love and affection to an animal is a good person.
Likewise, I liked Scarlet's integrity. She holds herself to a standard of professionalism and personal pride that not even heartbreak, ego-bruising, and wads of offered cash can undo. That's a good heroine. It's not that she isn't tempted to be petty and spiteful, she even considers how momentarily enjoyable it could be to take the moral low road, but she doesn't do it. I like that about her.
I even like the side characters. Jesus, the maintenance man, cracks me up. And the twist (I guess) at the end. Love it! Fun, fast read.