I have the new MBP for about a month. Numerous reviews are available on the net / press, so the purpose of this thread is not to try to replicate what has already (and more thoroughly) done, but just to share some personal experiences, and especially the ones in connection with photography.
The configuration I bought was the 15" TouchBar 16 GB one, with 1 TB SSD and the AMD 460 4GB graphic processor. A slight overshoot in terms of configuration, but as everything is now soldered, no chance to do a MLU - Mid Life Upgrade- as I did with the former MBP 2009 early version.
At the same time it was my first experience with the Sierra OS, as my previous MBP was too old.
My image software is mainly Adobe Lightroom (Lr) and Photoshop (Ps), I'm also using a Wacom tablet and a Datacolor Spyder 4 screen calibration sensor. I have still some Thunderbolt 3 HDD on order, but have already one installed i.e. Porsche LaCie 2 TB portable HDD. Unfortunately, my Apple Cinema 24" display with it's mini DVI doesn't work with the new MBP, so I'm on for a new screen.
System is stable, with a few Lr abends but really nothing worrying. The famous TouchBar is nice, but certainly not my driver for the change. With a 8 year younger MBP, and super fast Thunderbolt 3 connections, it is clear that everything is going faster, with virtually no lag.
More to come, but my first impressions are positive without any reservation.
A partial view of my setup: