I have some of the Ziterdes terrain pieces (a ruined manor house and the base of a ruined tower or keep of some sort), and I have found them excellent. The hard foam really is hard and durable, it has a tough finish, and takes paint and PVA glue well. As I recall I only did a little bit of drybrushing and some detailing of floor tiles and so on in different colours, followed by grass tufts and some weathering and washes. Very quick, but made a huge difference to their presence on the tabletop. What I like about the ruined pieces is that they have all sorts of interesting nooks and crannies that miniatures can fit in, making them great for skirmish games (I use mine for Mordheim). I would certainly recommend them, and I keep meaning to pick up some more!