UPDATE:
A few updated impressions from a few more days of use.
BATTERY LIFE is phenomenal except when using the camera, which drains it pretty quickly. The standby time is truly remarkable though, dropping much less than my S7 Edge. And I have all background data turned on, my Apple Watch connected at all times, Google location reporting on, and background location turned on for a number of other apps as well. I can't stress enough how nice it is using a phone that lasts me through the day without having to top it off. Now today, I spent a couple of hours taking photos and videos (including 4k video and the portrait mode) and it dropped quite a bit. But I left for work with about 50% battery life and it still had 35% left 8 hours later (and I used it with the screen on off and on throughout that time). Really impressed.
The CAMERA is very impressive with a few caveats. One thing I don't like is that the portrait mode is very restrictive with subject distance, which I guess is to be expected since it's labeled as a "portrait" mode. But there were times where I thought it would work and it kept saying get closer. That may change since it's still in beta, or they may just keep it very focused on actual portraits. Another thing I noticed that in some of my shots that had water in them seemed a little muddy. I notice this a lot with smartphone cameras, but it's a little distracting once you look at your photos blown up on the computer (you don't notice it on the phone itself). On the other hand, I am VERY impressed with the video stabilization, the exposure, color, and the panorama mode. One thing I do miss from the S7 Edge is the front "wide selfie" mode where you basically take a front-facing panorama to get several people in a shot. The camera app itself was stable, consistent, and easy to use, though I do think they could work on a couple of interface elements to make the app more intuitive. I think Samsung has the more functional camera app, but Apple's is more stable and consistent, in my opinion.
The JET BLACK color is very striking, and I have gotten a number of looks and questions from people (not that I'm looking for attention, I'd rather not actually). No noticeable scratches other than some very fine micro-abrasions that you can only see at certain angles in direct light. However, I got my Bestskinsever skin today and just finished applying it. It feels good (still grippy like the jet black finish itself) and it's pretty transparent, but it does have a bunch of little bumps and imperfections (some of which may clear up once it settles). Overall, it retains the jet black look while also protecting your finish, so I'd recommend it (though I'll reserve final judgement until after it settles). I will only be using a case for the phone when I go outside to take photos or doing something requiring a more rugged protection. In normal day to day use, I will stay naked (with just the skin on).
More later...