I have been driving this car for 10 days now. The EV range is not bad - not quite the 38 miles claimed, but definitely above 30 miles with 35 being fairly easy to achieve.
Performance around town is good in EV mode, with fairly decent acceleration. On a shortish run (15 miles each way) in the weekend we got up to about 75mph - the car keeping up with other traffic on the A40 with no problem at all.
Driving gently, expect about 5.5 miles per kWh, using aircon, higher speeds etc can push this down below 5 miles per kWh. For my 14 mile round trip to the office plus detours to a supermarket etc, this is absolutely fine.
As yet, I have no idea how the car performs when burning petrol.