Carburize,
What kind of castings are you simulating?
We tested Novaflow/cast on 5-15 ton steel castings a few years ago and to us it was utter crap. It had fixed mesh dimensions and we were not even able to mesh large castings.
It might have evolved in recent years (I haven't had the time to look at it at GIFA).
We would like to use Magmasoft, but we can't afford it. For the price of 1 licence we bought 2 fully automated resin bonded sand mixers!
We now use a inexpensive simulation developed by the Belgian Foundry Institute. It's good for small castings in gray and ductile iron. It has serious limitations for larger and steel castings, but we know them and take them into account.