Complement Move Motion Controller, the Move Navigation Controller is an accessory that seems dispensable to 1 first, knowing that we can use a pad. But to have played among others RUSE and especially with Heavy Rain, this accessory is essential: RUSE is more instinctive and Heavy Rain becomes 100% immersive. A pad is cumbersome and impractical when it is held that the left hand, which is not the case of the navigation controller, which holds perfectly in the hand.
Only small problem: No strap comes with! but if it is not a guy to hang around the house, offers something for almost nothing in the shops selling camera equipment. Another great invention Sony!