Great, but what about v5?
So far Terrain has been fairly easy to use. The drop-down menu is typically simple, and follows the structure of other plugins such as PT. I haven't experimented w/ terrain extensively yet, but have used it dependably for several simple operations. It functions excellently for discrete areas. However, large areas w/ dense contours seem to crash to software--but perhaps this is a Rhino(v4) problem? Along the same lines, there's rumors that this may be included in a future v5 update/release, but back-tracking to v4 remains an unfortunate necessity.