After trying another model that does not work, it's perfect. No bad contact. The AF-ON commands, primary and secondary wheels, the "joy-stick" function perfectly. The AF-ON button responds to pressure in an almost similar to that of the case (which is important to avoid motion blur that can occur when a button is too resistant). The infrared remote shutter works. The cigar lighter plug provides direct recharge a battery in the battery drawer EN-EL-third (watch the manual states that does not work with IN-EL3a!) I do not give 5 stars because the material is not as costal and that the shape of the handle is a little less ergonomic than the original Nikon grip. But at that price, still happy that there is a difference with the original material from Nikon!
Added after several days of use: be careful, the battery drawer is closed is a little loose and it quickly got it opens unexpectedly. To avoid the problem, I blocked the opening system with a piece of tape.
