I have tried Splinter Cell and Wind Waker so far. Splinter Cell was kind of tricky to use properly actually. You have to coordinate your attack fairly well with your partner to use it effectively. I would go into a hallway and ask my friend where the enemies were, and he would give the locations. When using sticky bombs, I would fire one, then tell my partner when to detonate it.
In a coordinated effort, it worked quite well.