Michael,

>and it's also a big question whether any input mesh can be used or whether there are restrictions on the input topologies.

Yep I asked the same question... If it is true SUB-D it have to accept any kind of poly model without retopology...


>One of the strengths of NURBS modeling is not just that you can do booleans but also that you can form large parts of your model from 2D curves.

True!