A roughly drawn site plan for use in massing.  Long rectangle is the sales floor, the medium sized one is back room storage, and the smaller ones are entry, bathrooms and office.

Playing around with the massing from the site plan.

My initial observations of the program's prejudices are that there is a tendency for things to automatically snap together, reinforcing ideas of contiguous objects.  With curved objects there seems to be less control over the creation parameters than with Rhino.  Curved object creation seems to be kind of on "autopilot".  This probably has to do with the process of continually updating geometry rather than from creating a single perfect geometry.