My thoughts, as someone who has owned two 100s, two 200s, rebuilt a 40 from the frame up, and has a 2025 premium 250 series with 4000 miles on it.
The 250 is subpar, in nearly every way. Quality is not there. At all.
Wind noise, terrible (like 20k car terrible).
Windshield literally rattles at speeds over 70mph (imagine someone riding on the hood and tapping the windshield with a quarter every second, nonstop). Dealer says no fix.
Passenger A pillar rattles. Dealer says no fix.
Driver and passenger AC vent rattle (loud). Dealer says no fix.
Brakes are terrible. Took two trips to get the TSB properly applied to stop the ridiculous squeal. Slowing from interstate or high speeds brakes are mushy. Braking in town, lots of times the car lurches while slowing down.
Rated for 22/25 mpg. It gets 17. Sometimes.
I could go on, but I won't. Just very disappointed so far.