I live in coastal North Carolina which is particularly flat. I have rarely taken my I-Pace out of town and it is excellent for my needs. This past weekend I had occasion to drive exactly 200 miles inland, the first 165 miles on (mostly) flat I-40 with the remainder on a good state highway (60mph). Temp was 85 & humid. Only one person in the car. No luggage. One outbound trip I stayed consistently 78-80mph and had 10 miles of range remaining. On return, I stayed at 70mph on the interstate and had 38 miles of range at the end of the trip. From other trips, the range appears to drop precipitously if you travel 80+mph. The 235 mile range seems attainable at the speed limit without much luggage or any passengers.