Here is my 0.02c after roughly a week of ownership.
Pros
Plenty of power and torque, no real discernible turbo lag, power is linear (flat torque curve beyond the peak). The little bit I got on it during the test drive has 25-75 in fast enough for a 3-row suv. If the power could be put down without de-tuning / limiting in the low gears, I would believe the 5.2/5.8 0-60. Especially if you could start out in 2nd gear as the first two gears are noticeably shorter then the rest of the gear ratio spreads. Depending on the compressor sizing there could be plenty of un-tapped power in the platform, but at 12:1 compression, there likely isn't a ton of efficient/ safe power in the oem turbo. My hope is that the turbo S has an upgraded turbo / cooling from the base turbo engine that accommodates the increased power. I understand from the ease standpoint you would want as many things shared between the two engine trim levels, but for longevity sake, more robust cooling and a turbo compressor that can support the higher airflow would be nice.
My commute is 60/40 hwy/city driving, and I could see myself easily averaging 28-30 mpg driving normally. We shall see how well efficiency improves as things break in, but this may be a case where real-world numbers are better then EPA estimates if you aren't going 75-80 mph.
The engine sound itself is awesome. Super quiet, until you get on it, then the I6 growls to life. You can hear some turbo induction noise when going full throttle too, which is always welcome. I am not sure how much of this is faked (played through speakers), but with the windows down you can tell that its not all an amplification trick.
Again vehicle feels planted and confident, I haven't pushed the handling side yet but thus far very happy with the overall driving feel. Vehicle feels more like a wagon / shooting brake then an SUV.
Cons
Thankfully I think more of my critiques are with the infotainment system / display layout, and will hopefully be cleaned up with software updates. There should be a general vehicle status page you can put up that lists everything the car has sensors for (in a configurable manner) (fuel efficiency, tire pressure/ oil pressure, coolant temp, manifold pressure, Gs meter if one exists, torque split front/rear etc.).
There is a singular page for fuel efficiency (which is fine), and if you hunt around to the maintenance page you can find the tire air pressure readout, but that is really all I could find in terms of getting vehicle status. With the way the UI is setup, it seems like they intended for things to be added down the road.
The combination of regenerative braking / clutch-pack transmission is a little jerky, but I am hopeful that will smooth out as things break in.
youtu.be
