"I love the aesthetic of the new Mars Exploration sets. The focus being on exploration and discovery instead of combat gives this line a charm that separates it from most of the other space themes of the last decade or so. I've bought three so far (with a fourth on the way) and so far the Rover Testing Drive is my favorite. The smooth, streamlined aesthetic looks great on space shuttles and the like, and you'd think it wouldn't work as well on a rough-and-tumble ground vehicle. However, the rover winds up with its own distinct look that stands apart from the other sets in the line but still fits perfectly into the overall aesthetic. And the smaller additions (the geode, storage container, etc.) make the set feel fully integrated into the world of Lego City."