In my past, I've worked with NetApp, Equallogic, EMC, and various other NAS/SAN devices.  After working briefly with SoftNAS, I can say that anyone familiar with those types of systems will feel right at home.  Think of the SoftNAS vm as a "controller" and the local cloud storage as "shelves."  The layout and terminology should make sense to anyone with a storage background.  That level of knowledge could be comforting to an organization making a transition to the public cloud.