It is smaller than the orginal charger that came with the D780 so more space effecient. Just drop the battery into the charger to see how much charge is in the battery so it does not need to be put in the camera to see the charge level. Charging is fast and it does come with a cord to use it in the car. Overall an excellent product.
This is definitely worth the purchase. The LED display showing you your current charge levels without having to plug it in makes for an amazing feature. It also charges fast and comes with a car adapter. This is a solid product.