The best feature of this program, which I like most about it as compared to other simulators i have tried in my time so far was that there were very less bugs with its implementation or functioning when using different types/kinds of solvers available within itself; also had excellent tutorials from where one could learn new concepts quickly while solving problems at work place level without any hassle! One can use multiple mesh systems such us tetrahedral meshes etc., but if you are not familiar enough then go through some basic tutorial first before proceeding further into more complex things ;-) As said above everything else works perfectly well too!! And lastly what we liked least would be sometimes slow response times though working fine otherwise!! Overall experience has been great thus making me feel comfortable towards writing programs related only foam!