What I didn't like about the Woodland Scenics foam roadbed is that it's so soft that the small wood-type screws that I used through my Gargraves and Ross wooden ties would keep on biting long after it should have stopped, IMHO.
In other words, the soft foam had high and low spots. The cork I used didn't give at all and stayed a consistent height.
The foam was very easy to cut and shape, though.
