By the time you read this article, you will probably be able to repeat most of our calculations on an ordinary desktop computer, and you will certainly have a much wider choice of software with which to do it! Such is the speed at which the neutron-scatterers toolbox for molecular modeling is developing. The increasing use of computational methods to predict neutron spectra from atomic-level structure may seem blasphemous to those who are more accustomed to measuring physical properties directly. However, a large number of experiments can only be analyzed by comparing models with measured data, and computational methods are now the ultimate means of comparing a zero-parameter model with the results of a neutron-scattering experiment. Carefully devised experiments will always be crucial for distinguishing between models, and neither the experimental, nor the computational method, should be considered in isolation.