My wife and I private lease a Kia Niro PHEV in Umeå Sweden. It does not have battery heating as far as I know, but the fully EV one (just released) does.
Some good points:
1. Battery charge in very cold weather (-20oC so far) is AOK, charges fine and range seems to be the same
2. 55km is stated electric only range, our commute is 54km and when leaving the car states it has between 54 and 57km each day
3. Charging is adjustable - we have awful electricity supply at home, so we charge at 4-5A for 7-8 hours to recharge each night
4. This can be adjusted up to 16A on the home charger they give you (standard swedish 2 pin plug)
5. The car can also be set to charge at a different rate on commercial chargers (again from 4-5A up to 16A) - so we never have to adjust the car
Some less good points:
1. The heating is provided by a small petrol engine that helps the car along when accelerating hard or low on power
2. This is clearly not set up well for swedish winters - as the car will sit in HEV (hybrid or petrol mode) for ages (40 mins ish) and switch to El only for 2-4 mins and back to HEV for 10-15... rinse and repeat
Even though the car has plenty of heat in the radiator. You cant stop this from happening unless you turn off the heating in the car (within 1 minute you have frost on the windscreen inside).... so - not great
3. European drivers do not have access to the remote app for the car like yanks do - so there is no preheat in the cabin etc... We can get a fan heater installed, but this is less than optimal.
But - on spring, summer and autumn days, we reduce our commute costs by over 90%. Winter days, warmer than -12oC, the same, colder, it costs us about 50% what our A4 B6 1.8T avant did. So - it will be ok for the 3 years, but we are going fully BEV electric once the lease is complete.