SurfaceWorks in SolidWorks experience anyone?

I’ve recently downloaded the eval add-in of SurfaceWorks for Solidworks, which allows manipulation of nurb surfaces within SolidWorks using the ‘Replace Face’ command.

Does anyone have experience using this particular module? If so, how happy were you with the results? From a first glance, it seems really useful, but that’s w/o having seen any of the surfaces produced into RP or real product.