I've seen videos of that car... don't they only have like 40 miles of range, and the range extender only holds like 5 gallons of fuel?
Later models, 120ah full electric version, the range is about 250km. In comparison to newer cars, not a lot, but considering you can buy newish used ones for under 15k, its not a bad deal if it fits your needs.
If I was in it for the karma I'd be in the billions by now.
It was either 1.9 or 2.4 gallons depending on the model year, but they physically had the same gas tank.
As for the range, I'm getting about 110 miles of range. It depends how you drive. This is the 94Ah battery, the later models had more range.
It also came in handy for a bad road trip (charging stations more than my range apart, so I couldn’t otherwise get there from here, but hold state of charge kept it up at 75% with frequent gas stops)