I can't speak to how they look on a tank (as far as what colors they accentuate on fish) but when I was out a their place about 6 months ago, they showed me two tanks. One with what I believe was an Aqueon fixture, and the other with their fixture. Theirs was distinctly brighter, it lit up more of the tank, and the light was more evenly distributed than the other fixture.
I know that I'll be building an led light myself at this workshop, and I'm thinking about buying the materials from them to light my entire room with.