I've had my S7 Edge for a few weeks now and can't fault it. The instant focus and low light shots make that camera prefect for my use.
The always on clock does have a night mode that can be timed when to move in or out of night mode. On night mode you get a very dull clock, date and battery life on the edge of the phone, and it works perfectly in the dark. Personally I have this on all the time as I don't like the way the big clock jumps about.
I moved from a Note 4 to this and the device is much smaller but the screen real estate is practically the same.
One massive bonus of the S7 comes if you buy the Gear VR... SO much better at tracking than a Google Cardboard or the poser plastic ones, plus the integrated controller works superbly (although you will need a proper games controller for some of the games.