A great feature of Visio SmartShapes is multi-shape capability.
With multi-shapes, you can quickly modify how Visio shapes look via the context menu or shape data fields.
This represents not only a time-savings to users creating drawings and diagrams, but also simplifies the design and maintenance of stencil libraries for solution developers.
So yes, multi-shapes are cool, and they are a big part of what makes Visio cool.
If you haven’t yet run into them, read on to get a better idea of what multi-shapes can do for you!