I purchased Cinema 4D specifically because it's is one, if not the best program available for importing MoI objects.

If you're using MoI v2 with the new shading features, be sure to install the Riptide plugin so those surfaces get imported properly.

I typically use MoI strictly for mechanical models - NURBS modelers don't usually create surfaces are are SDS friendly, so subdividing them will mostly always end up showing artifacts due to the polygon topology.

Without using subdivision, your models imported into C4D should look exactly the same as they do in MoI.

-Will