Excellent set of tiles. I've used many of them for the skirmish/board game western I've designed. I would have liked for their to be more actual lands though like praries and grasses, much of what they call lands and fields is actually some pretty rough terrain though several came in very handy for the side of the board I made for the Ranchers (such as the haybale tile and cattlepen tile).
LIKED: Tiles that were directly useful for a project I'm working on.
DISLIKED: Would have liked less "marsh" and water tiles and preferred more prarie and field tiles.