Just a short review, more of a user experience. I bought the D7500 for a month long trip to Europe. I was replacing a D7100 that had some nagging problems that often left me less than satisfied (It had been dropped - and repaired - early in its life, but was never as good as I expected). Anyway, I filled 4-5 64 Gig memory cards on the trip, and I have to say that this camera is far better than my old one. The low light abilities are awesome, and on the few instances where I needed to take a picture hand held in low light with some depth of field, ISO 16000 was a very viable option. Not noise free, but better than ISO 6400 on the older camera. Other features that made the user experience better: I could easily transfer pictures to my phone - very important to my wife and convenient for sharing or posting to Facebook when traveling without a computer. The connection to the phone also meant that I could share the phone's GPS with the camera and therefore get location tags on every photo. This worked very well, though it is possible that it negatively affects the phone's battery - but my phone is old and it is hard to really tell. (I think the automatic download was more detrimental to the phone battery, and it took a little searching to figure out how to turn off automatic downloads for every photo). As for the camera battery, it was also good, though again, the automatic download seemed to affect it a lot, as did a lot of activity on the display. The tilting screen was useful to have, but not as useful as a fully articulating screen (like the D5300). The touch screen was awesome, and made it VERY easy to check critical focus and work with the menu - even with gloves on. I was in a cold weather environment, so I had gloves on much of the time. These gloves had something on each finger that would let it work with an iPhone, and therefore it worked just as well with he camera. I liked the feature where you could use the live preview and touch the screen where you wanted it to be in focus, and it would refocus and take the shot.
I understand why people complain about the missing second SD slot, but as long as I carried a second card around, it was fine. I never made automatic backups anyway, and I can live without putting RAW on one card and JPG on the other. It would have been nice, but the other features are more important to me. The depth of field preview seems to be gone, and that is disappointing, but it is usually easy enough to take a shot and check depth of field and then take another. The exposure settings were a little more confusing to me, and I could not reliably determine if the camera tended to over or underexpose. I think I ended up using plus or minus 1/3 of a stop a lot of the time, and sometimes a lot more than that.
Overall, I am very happy with the purchase. I might change my mind after reviewing the thousands of photos I took on the trip, but based on what I have seen, it is a definite upgrade!!