Although there have been no great leaps forward in the design of plant for crystallisation from solution in recent years, our understanding of growth rate dispersion, the extension of the two-step model of crystal growth to a three-step model when required, and also convenient modelling approaches for crystal morphologies and the development of tailor-made additives have nevertheless greatly advanced our knowledge of crystallisation processes. Substantial divergencies in the measured values of crystal growth rates in the past decade can often be explained by paying due attention to the measuring methods and the purity of the substances as well as the nature of the solvent. Comparison of results obtained by modelling should always prove more satisfactory when heat effects are considered whenever this is necessary. The possibilities of crystallisation plant design are greatly enhanced by the availability of reliable data as a basis for calculation and when influencing crystal shape can provide downstream processes with a better product.