The premise is exciting, showing that CYCLOPS operatives are not as clean and omnipotent as they seem.
Every antagonist is handcrafted with its own, rememberable quirks, mutations and personalities and their actions and positions in the scenario really align with their character.
The location, an island, is packed full of interesting and distinct spots. All of them have events linked and depending on the actions of the players, the situation can change really significantly.
The story is a gem of gory, dark and grim situations. While it might not be for everyone, if you (and all players) feel comfortable with it, it is really rewarding and interesting.