Here Today... Aragon Tomorrow is a dark dark dark green, with a fun surprise: shimmer! It reminds me of the forest late at night and algae. It's definitely a color that's right up my alley, and I wish I had used it sooner (I've owned it about a year).
Application-wise, it applied wonderfully. The first coat was pretty transparent, and it needed three to even out all the bald spots. But the coats applied incredibly smoothly, and was really easy to control.
Overall, Here Today... Aragon Tomorrow is a complete winner. Fantastic color and fantastic application.