I like how it can be used by any member of staff, including non engineers (myself included), as well its capability for creating complex models with multiple elements - such as pumps/pipes & valves or buildings etc.- Its ability to create BIMs from scratch makes this software stand out against simulators which tend not to have these capabilities. The interface could use some work but we've been able get around all our problems so far! We're using MMSB primarily because there are no other options available at present time; however if another product becomes more popular then maybe they should consider bringing back their older version? It's great being part of team members who understand what needs doing when you say 'I want something done about X'!!