It is Mainly for beginners or novices looking to better understand the concepts and the hows involved, however it is also a good reference for intermediate and above model railroaders.
Below you can see an alternate fullscreen version of the phone (a hardware referencemodel, not a device you can expect to buy anytime soon) up and running its browser app.
While Hong Kong was more of a business center and Macau was becoming a resort destination, there were enough similarities to cross reference the data and his team was able to create an analytic left-brain quantitative prioritization model using a right brain intuitive approach to the data.
But others defended both the Demand model, which employs a vast network of low-paid freelancers to crank out simple reference articles, and the content itself.