At first look it's good, but it needs more depth. Effects are wonderfull, Lighting source isn't really good, use 250 white soft brush and make a Lighting source. You need more contrast and brightness, and use black soft brush and darken up edges of the sig, but don't go too far. Maybe little sharpening on render, and a little blur on BG. And move that text a little more up and closer to the girl.