Among my favorite Vue features are the rendering quality, EcoSystems, Material Editor (including Function Editor), Metablobs, and Vue's Interface. And probably the least favorite feature(s) are probably the presets and the standard terrain editor. I find just about none of the presets usable in their current configuration. Especially the atmospheres and landscape materials. And the standard terrain editor, IMO, is not even as good as Bryce's which was created e-on's ago (pun intended!)

I do really like procedural terrains and am using them almost exclusively these days. :-)