Apart from the delivery which is perfect as always at Amazon, this is "essential" to making the portrait photo, because you can see both on a larger screen the photo that we will take (fashion "live view "), and make adjustments pushed more simply. That said, I do not find Nikon's solution absolutely perfect, and even a little winded incomplete view, which is a shame. I prefer other software like that, my professional final choice will go to Capture One, but is more expensive. The latter includes a development solution for high-performance RAW, the same level as DxO Pro (the latter has yet to device control mode from a computer) that can be applied before triggering ... It "sees" what rule. I also tested "control my Nikon" which is very buggy and only works on PC, Lightroom that allows the trigger settings and no, not even the "live view" mode, thus unusable Studio (no interest) , Helicon Focus (great but to manage depths fields only). Anyway, who wants to use his case "a distance" (ie that of the USB cable), on a Nikon case, there aces them very professional solutions, for me in the lead, one and two Capture Camera control pro2 a little less powerful. In the case of camera control there is a RAW development solution provided by Nikon but otherwise it's either ViewNX (free) or capture NX extra charge. At this stage, I prefer to use Camera Raw with Adobe Photoshop provides, or DxO Pro has many advanced features. Capture One allows in addition to using your iPhone as a remote control without trigger wire ... The advantage of this type of product is to make the settings from your PC or Mac, seeing the live scoreboard (real time) on the screen of it, which is always bigger and better resolution as your case!