I've been slowly working on building my terrain for my new board and I finally broke down and purchased the citadel wood. Happily I think it looks quite good:
I even made sure that some of the large stones were painted bone to look like it was once an Eldar bit of terrain that the planet has taken back. Painting it was a three night process, but if I had more time it's easy enough to do in one day.
It looks great and feels appropriately sized for the other models. I recommend it.