It turns out that RFEM is one of the best software for dynamics and nonlinear problems - significantly more user-friendly than competing programs, and students are quick to navigate and understand what counts. As a positive experience I would like to mention a user-friendly preprocessor, where structures are modeled almost as comfortably as in CAD, very well designed 3D modeling including fast calculation.
In my dissertation thesis I simulated the behavior of a concrete cross-section with composite reinforcement during collapse in RFEM and RSTAB. Compared to the experiment, the results of the nonlinear calculation differ in the order of units, while the linear calculation differs in the order of tens of percent. The speed of both calculations in Dlubal Software is in seconds, unlike competing programs.