I have finally played with all of the cards. I like having them in the game. The interesting thing about them is that they are used by all players instead of being owned by any one particular player. (The ones that are traps will trap everyone, etc.) You use one or two each game and everyone decides where to place them during setup. They go on the common boards where bonus cards do not go. (as they are not bonus cards.)
I will tell of a few of them:
One gives 3 wounds to a player who stops on its sector. One allows you to take 5 wounds to end the game immediately. One slows movement equivalent to a tentacles with an upgrade token on it. A couple change the gameplay if the Malfunction Token is placed on them.