The best thing about this software has been its flexibility to model anything from animals and plants all the way down to molecules or even circuits! I have found it an easy tool with which you can build very complex 3D simulations easily without having any prior knowledge as well - there are tutorials in place so anyone who knows how to program would be able to learn quickly enough if they wanted too! If you're looking into building realistic simulation environments then surely simpany should definitely come up in your list since it's one of those tools where things just seem natural when modelling using them (I'm talking specifically about organic structures).
Also their pricing structure seems quite reasonable also, not much difference between student/student priced versions compared to corporate ones. My research team at my university had used repasta before we started our own project and hence was already familiar with what features were available out of box. We got help while setting everything up but otherwise managing it ourselves also was.