From what I've seen, the styrofoam moulding is much cheaper than wood moulding for comparable sizes and designs. I'm sure no one could tell the difference once it's painted. In our large home center where we buy most of our supplies there wasn't as much selection, though. A clear advantage that it has is that it is so lightweight and would make it easier to install and it won't shrink and swell with humidity changes. If you find some you like, I say buy it.