Hi. I do not know why people think Sketchup is free. They havent read the license agreement. SKetchup is NOT FREE product for commercial use. I dont think those people use that just for fun. And comparing Sketchup with Moi is not applicable at all. Sketchup cannot handle NURBS and Moi has not got some of those powerful feature which Skp has as well as Moi is still young compared to matured Skp. So If someone likes Skp. use that If someone likes Moi use. but Skp. users will never create accurate geometries on the basis of facet 3d engine.