I took a Mini Cooper EV out for a test drive today. It was the John Cooper Works version, which is essentially an electric hot hatch. It's got similar performance to the i20N that @Brian recently picked up, and I suspect a similar character.

Most reviews have complained about the ride quality, and it is firm, but I liked it. The Mini felt a lot more connected than the Hyundai Inster I drove a few weeks ago. It'd probably be less comfortable on a longer motorway or freeway run, though.
The other criticism has been about the thick steering wheel. I've got enormous hands, so I thought it was comfortable.
The design of the displays felt a bit overwrought. The graphics and styling were aiming for a cartoon Britishness, which verged on the Austin Powers. Stepping it back a little bit would have helped.
Going long distance would be fine, I'd get nearly two hours driving at highway speeds (110 km/h or 70 mph) from 70% of the battery, which would mean three stops between here and Sydney, which is about 675 km or 430 miles. That's roughly what I did when I last time I went.
The problem is more those runs that are off the charging network. I made a 320 km or 200 miles roundtrip last week, and there weren't any chargers along the route. The Mini probably doesn't have the range to do that, whereas something like a Kia EV3 would.