I'm not sure if anyone on here has had a chance to sit in the interior of the new Mustang (I know the ones at a lot of auto shows have been "locked for our safety"), but I was able to sit in a new GT Premium briefly at an employee event and I figured I'd share my impressions. Just note that there were still some pre-production stuff on it, but the interior was 90% ready from what I could tell.
Seats - This model had the premium heated/cooled seats in chestnut/saddle leather and were very nice in my opinion. The leather was pretty soft and the seats were nice and cushioned. They did a good job of hugging you without being to annoying and were just so comfortable.
Toggles/Buttons - I finally got to try the toggles in person (obviously with the engine off) and I'd say I was a bit disappointed in the functionality. I had previously expected the toggles to be more like a switch where it stayed in position, but they were more like rocker switches where you clicked the toggle up to change the setting instead of having 4 positions for each setting. The toggle material felt nice, but it could use more feedback to let you know you've changed the setting. The buttons felt "clicky" enough and I liked the feel of the ones on the center console.
Visibility - The visibility was good in the front and so-so in the rear, but better than what I've seen in other sportier cars. You can check your blind spots, but it may take a little more neck turning given the size of the rear pillars. The front is easy to see like the current gen.
Ergonomics - The interior layout is above average in terms of ergonomics. Most everything was easy to reach and operate. The one thing that may present a problem (as many of you have pointed out) is the steering wheel controls mounted under the main spokes (for phone functions I think) - they're not very easy to use if you want to keep your hands on the wheel.
Shifter - The shifter throw felt good, definitely improved from the current gen. The shifter height is a little short, but shifting isn't a far reach or strenuous activity.
Just remember that these observations come from a brief time spent in the interior and may change in final production. I just wanted to share my impressions.
