Hi there,
I come from the opposite direction - started way back in VW (MiniCad6 to be exact) all the way to present VW20 and just started learning C4D. VW is a great program for drafting and has a ton of graphic friendly capabilities (I actually prefer it for some graphic tasks over Illustrator which I find so NOT intuitive). For creating architecture, it works really well - starting as a 2D plan / elevations and then using that geometry to extrude into 3D shapes. For creating / adjusting anything that has complex geometry it chokes horribly. I am an old school scenic / environmental designer who started with pencils and moved to Cad a long time ago. If you come from 2D to 3D, then VW is intuitive. If you are used to designing / building in 3D it will be a challenge. Renderworks is the reason I went to C4D and I am so glad. I am only 2 months into it and feel I am just scratching the surface. However, since C4D and VW are owned by MAXON, they do play well together, built only from VW to C4D - not the other way around as others have said . . .
Dan