So far it has saved her approx 2k on petrol costs alone.
Then there is maintenance costs....No major issues. Less than 200 per year so far if you exclude the fresh set of tyres we put on it when she bought it.
99% of our journeys can be done in it. It's rare for either of us to need more than 80mi in a day.
It can get a full charge off a standard british plug socket over night too, so we dont have a fast charger installed or anything. Most days we only do 10mi, so it goes for an overnight charge once a week and thats fine.
The result? We have to remind ourselves to take the petrol car out for a spin every 2 weeks just to keep it healthy.