1. Appearance. Everything is clearly adjusted, there are no complaints about the assembly, all materials are of high quality, the device is pleasant to hold in your hands. I have an Iphone in Black matte, if prints remain, they are only barely noticeable. In my opinion, it looks much more interesting in this color than 6/6S in Space Gray.
2. Display. I consider the touchscreen to be the best among smartphones. The oleophobic coating is of high quality, I use the device without a film, fingerprints on the screen are almost invisible. The quality of the picture is good, see comment(2).
3. Sound. Stereo speakers play clean at any volume level, compared to the Iphone 6 and Samsung Galaxy S7 Edge, the sound is an order of magnitude higher. Several times I had to listen to music through my native EarPods> Lighting headphones, the sound is juicy, voluminous, basses are present. Overall I give it 5 stars for the sound.
4. Performance. I don't play games, so I can't say anything. In general terms, you can run a bunch of different applications in parallel, over a dozen browser tabs, etc. , and switch between them with a delay of less than 0.5 seconds. At the same time, no application slows down. For me personally, this is an indicator, not a single lag, reboot, freeze for 5 months of operation. I give a solid 5.
5. Camera. For a smartphone, which is the main one, which is the front camera, in my opinion are excellent. Photos are of high quality, stabilization when shooting video works perfectly, and there are small noises in low light, but I'm afraid that any smartphone will have them. I didn’t particularly compare with other models, but both cameras suit me 100%.