I am a bit afraid of using the player cards with the guarded key word. They are cool and powerful and everything but... basically in a single player game they double the revealed cards you have to handle and in a 4 player game you have already enough trouble to deal with. (To be honest, some of these games you lose, because your decks do not fit well for a certain mission, but most the times you lose, because you either draw 4 locations or 4 enemies in a single round. At least if I sum up my games.) On the other hand, when playing an easy mission you do not need their extra power. So in the end these cards seem to be "win more" cards for me.
What is your experience with these cards?