Not bad, the white doesnt really go with the sig and what ever you did to the bottom left side doesnt really look that good, but everything else is alright.
It all looks a little bright for my eyes. Maybe calm down on all the whiteness.
Also, I'm not over keen on the text placement as it looks like it's been slightly cut off with the similarity of the colours of the text and the colours on the jacket.
I could get you a nice tutorial on rounded edges if you'd like. The way you seem to have done it doesn't look like the way I usually would.
From what I can see, the choice of colours would fit well if the white was toned down a little.