It gives you theoretical information, to get an actual representation graft of one of your hives you will need to input a lot of information that most us do not have the time to collect and input. It may be use full to a researcher or if some one would make a typical model file for a 2lb package, 3lb package, 3,4,5,and 6 frame nucs. But it still would not take into count the local conditions that will effect buildup.
as a researchers tool I think this could be useful and a good app for viewing models that are presented but for the beekeeper the observations that would be needed to get an accurate model would be to time consuming.