I work in metal stamping tools, and we need a lot, radius stebacks, like the ones below:
Creo option for radius corner sphere, is very limited to this result. So we need to the isdx extension, to generate this kind of surfaces, with more than 4 sides. In other CAD packages, this surfaces are available in basic packages. What I intend, is that PTC includes this option in base package of CREO, like others. Today we had the need to bought this isdx extension to generate these surfaces, and it's the only command within isdx, that we are using. Very profitable for PTC!!!