I really like that it's free to use, as well as being able to run in your own machine with no need for additional hardware or software licenses (which are pretty expensive). It can be quite slow at times when rendering large scenes but this isn't too much of an issue since you're not using realtime graphics anyway - just something nice if someone wants to do some more serious work later down the line! If anyone has any questions about how things function within yafaray then feel welcome to ask them here :) The interface could look nicer/be less cluttered, so there aren't many features people might want from their first time interacting wthyaffray. But once they've used it enough everything else takes care of itself :D.