This is one of my favorite shows on TV. I enjoy astronomy to begin with, but the way they gradually reveal things throughout each episode just keeps me glued to the TV. (This even includes stuff I know they're going to talk about.)
Sure, it's mostly CG, but it's a real treat to watch. If it was ever released, I'd easily put The Universe on my Blu-Ray shelf next to Planet Earth as must-watch (repeatedly) nature television.