We use real clay models, laser digitize, then import into Rhino3D for surfacing. Virtual, onscreen, clay with virtual surface "feel" through simulation, I can imagine the bad disconnect from the real world form. The singular advantage, no clay chips to clean up. I have seen Rapidform surfaced models, models built in Solidworks, models built in Catia, I prefer the Rhino3D result.
I have used Rhino for the past ten-twelve years to build free form and technical products, shoe lasts, blow molded toys, EPS sculpted bike helmets, snowboard bindings. If you know what you are building, Rhino will build it just fine, if there are manufacturing restriction that you know of, such as mold parting lines, Rhino3D will work great. If you need things such as draft angles done automatically, better to use the more technical, restrictive modelers like SolidWorks, or import into for technical interior work.