Although this should be understood by most people after working in the work place for a few years goes a long way for those who are newer or just didn’t realize it. The article Don’t make the Demo look Done is great at describing what someone else would see coming from the public, clients and boss.
But basically says make the program look as finished as the program actually is. If you want feedback on functionality don’t make it look polished. Make the visual representation look a certain way to help get the right feedback you want.