A good layout, nice distribution of bonuses, chokepoints etc. A bit of luck comes into it with the fog, and which way opponents move to expand. best with 4 players!
This board requires a good balance of aggressiveness and defense, and knowing when to switch gears. Some games may last a while. Using the tunnels and transfers on your towers (which have a unit limit of 8) is key - and don't go to long without checking out the middle (+8 mines)! The lookout towers enable you to lift the fog for much of the board, but not all of it, so you can still keep some secrets from your enemies. The board I think is balanced enough where if one player takes out another player's camp, it's not all over for everyone else.
I'm probably a little bit partial to this board as I helped CK66 beta test this for a while (even back on ToS).