A prototype is worth a 1000 meetings..
Here are a number of videos showing the software prototyping application in action. Both basic S88 and also S95 modelling is covered.Some videos have audio.Video format is .webm which is supported in all modern HTML5 browsers such as Chrome and Firefox, but not internet explorer and not on the IOS (iphone) operating system.(There is a plugin available for IE)
Though the terms modelling, simulation, and prototyping are used interchangeably on process control forums, we use the term prototype in the context of an agile software development project. You can use Spike to speed up requirements capture for a DCS or MES system. Use it to improve collaboration and provide a training environment. But dont use Spike to (for example) work out a controller strategy for runaway chemical processes or potential yield on a distillation column; there are other simulation packages better suited to that job.