It's been said already but the border could use a change. It's too "soft". Maybe make it a little sharper, and crisper, without any blur. Look at the bottom left corner, and compare it to the top right corner.
All in all, I like it. It looks good.
I'd have to agree. Just change the border a tad.
Other than that, I don't really see much else that could be improved.
Great job.