From my personal experience Lightroom and Photoshop don't even come close to rendering the Nikon RAW format accurately the way CaptureNX2 does. After switching to CaptureNX2 for my initial import and looking at the same shot in Photoshop I can't believe how horrible the image looks in Photoshop.
That's because Nikon's software is designed to maximize the RAW images made by Nikon cameras,and not the RAW images for Pentax,Sony,Minolta,Olympus,Canon, Samsung,Hasselblad, Mamiya,Kodak,FujiFilm, and another half-dozen camera manufacturers. All the resources that went into developing Nikon Capture have been optimized specifically for Nikon, including the full raw specifications which Nikon has NOT shared completely with other software developers. Adobe has had to reverse-engineer the NEF format; NIkon is not compelled to disclose eveything about its image file format and its informational structure; Adobe for example has to GUESS at the white balance information encoded into every Nikon D2x or D2Xs NEF file; that information is proprietary,in Nikon's view, and that white balance information is a key component that Nikon Capture can read; all other converters must "guess" the white balance. Nikon is different than Canon in this regard.
Nikon CaptureNX will also allow you to work with JPEG and TIFF files from all other camera manufacturers, however, mostly so that users of those cameras can gain access to a remarkable feature called Control Point Technology, or U-Point Technology (same thing, developed by Nik Software, te company that actually writes Nikon Capture software).
I've owned Nikon Capture since version 1.0 went to 1.1; it is NOT the same type of software as Lightroom OR Photoshop. Most really "hardcore" Nikon shooters think that Nikon Capture is the best raw file converter for Nikon .NEF files, but the workflow is vastly different, and slower, than Photoshop and especially Lightroom. Look up Control Point Technology or U-Point technology, which is available free as part of Nikon Capture NX. The Japanese language has a special word for the yellow-green color of green of a newly emerging spring plant; the green renditions and differentiations between Adobe products and Capture are one of the biggest areas of difference: Nikon is from a culture where green rendition is a part of the language and the psychological mindset; other software is not. Green is green is green, right? NO-ask Nikon or FujiFilm about green rendition and its importance to the overall color palette.
Nik Software sells this technology as Viveza. IF you'd like to see how Nikon Capture will allow a BEGINNER to make AMAZING adjustments to his or her photos by using the local controls and the smart-masking technology without a 5- to 10-year training period in Photoshop, go to the URL below and look at the tutorial, and you'll see what the Nikon Capture-using salesman slash teacher was trying to tell a bunch of beginners. Look through the on-line lessons,and you will see the huge image editing potential Capture brings with it. And no, it is not the same as quick masking in the Adobe family; Nik Software's technology was unmatched for several years,and still is, And Adobe tried desperately to come up with an equivalent, but they failed to make it beginner-level accessible. For the kind of people who want results, with a few clicks of the mouse and a slider or two, that is why Nikon Capture NX 2 is one of the most unusual raw converters and editors. NX2 is NOT a DAM program, like Lightroom or Aperture.
Nikon Capture gets a bad rap from people who do not own Nikon cameras, or who have never used it,and think that all products are created equal,and that Adobe's products are the "best". Lots of brand loyalists advocate for Lightroom and Photoshop, but there are many serious Nikon users who understand the value of software designed to FULLY optimize their files, and not be a COMPROMISE software app, capable of doing "okay" on 199+ different raw file formats spread across a decade and multiple companies.
Nikon | Imaging Products | CaptureNX2
Look at the Lessons sub-head and watch the demos. You will see what the salesman/educator at the camera store was trying to convey.