Well, as many others have pointed out, the text doesn't seem to fit the overall mood of the signature. Tone it down a little bit, make it a tad darker? Also, the font and placement don't seem to go well with the render. Possibly make it a little more jagged, and make it a little smaller. Blend it in with the render a little bit, and maybe put it in a corner? All just thoughts, other than that, it's immaculate. Great job! 9/10.