I'm not an RR, but I have one point of criticism, and I think it's what Enforcer is trying to get at.
The text color is similar to the background color, meaning little contrast.
For a user with a screen that doesn't do well in bright sunlight (of which there are many), that lack of contrast will make button labels difficult to see, thus making the skin difficult to navigate.
It's a similar situation with both the red and the blue versions of the skin.
The design is clean and well thought out, IMHO. It looks damn nice.