At my former Nikon F4 I had off and the Battery Pack MB-23 - and did not want to miss it. So I decided on my new D7000 dranzuhängen a battery pack. To make it short - no more no! The advantages are (as with my former F4E.) Are obvious: better usability by edgewise trigger, better feel, longer battery life. The disadvantage of the slightly higher weight remains as low. Who decides to buy, should also order a spare battery equal. Again, in relation to the possibility to use the advantage of lower weight regular batteries. The brackets for both variants are however included. A downer there, however: the battery in the camera remains there as well, so you have to unscrew until the battery pack when changing the battery. Otherwise strong buy recommendation, because it is the most sensible accessory ever!