This map should provide a nice, but difficult introduction to the CTM genre for newer players. If you're really uncomfortable with custom maps, or are still pretty new to minecraft, I reccomend easy. The limited resources should make this map a less overwhelming experience to new players.
For veteran CTM players this map should also be a nice and difficult experience. If you are a total l33t pr0, I would recommend hard, but the map should be difficult enough playing on normal.