Yes, I have tried the demo. It is pretty impressive, but finicky with regard to video cards. I have a high end Nvidia Quadro card (although a couple of years old) and it will not run on it. At home I'm running an ATI gaming card and it runs okay there.
I thought that it might be a good tool to use along with Rhino, especially for adding complex fillets. However, the complex fillets fail more than they succeed, so it's back to Rhino. At least if the FilletEdge command fails in Rhino, the FilletSrf command is there to get the job done.