Summary: If you are serious about your photography, this is a must have. The flash makes the SB-800 feel like a relic. The light patter function is very effective and versatile. This unit is also much more powerful than the last flag ship. The commander mode works flawlessly as expected. The automatic gel recognizing feature is very useful. It balances the ambient light color to the flash output making it very easy to control white balance.
Pros: Consistent Output, Easy To Use, Fast Recycling, Powerful Output, Versatile
Summary: The NIKON Creative Lighting system is really nice. I am using this flash along with a D700. The ability to substitute NIKON speedlights in place of larger, heavier studio units is a blessing. It makes for an extremely portable studio set up. The SB-900 is also perfect for snapshots as an on flash replacement for the built-in unit. Combined with the metering system of the camera, it makes for a nice balanced fill light.