The artwork on these is very good, and the tiles themselves are modular and can be connected to each other and to other tile sets from this and competing manufacturers quite easily, making this set very versatile and reusable.
Most of the Map Pack sets consist of large, simple single-room "set-piece" areas, but the natural cave tunnels depicted in this set include many great twists, turns, hiding places, and other nice places to explore. The tunnels themselves are quite narrow; most competing products have wide tunnels, which are great, but this set delivers something a little different, which makes it perfect for combination with other cave tile sets.
My only complaints:
1. The cardstock is somewhat thin; I guess this can't be avoided, but a competing product (Dungeon Tiles) uses a very nice, heavy cardboard (reminds me of the cover of a hardback RPG book cover); I suppose these tiles can be glued down to a heavier material to keep them from sliding and to make them more durable; I'll try that out sometime.
2. A couple of the cards are less useful than the others. A card apparently representing an outside entrance to the cave is hard to see; this isn't too big a problem. The lava area looks a bit unnatural and I will have a difficult time finding a use for it; I would rather have seen an empty room with some partial cover or movement obstructions (similar to the mushroom area); perhaps some boulders or rock formations. And the chasm and river cards cover the same ground: the chasm card could as easily depict an underground river with dark water, leaving the cards representing the river with blue water free to be replaced with more of the great tunnels.
These are small complaints, though, and the set is otherwise great.
