I didn't start in the UK, so none for me. Just wanted the car to explore outside of Seattle etc.

Just charging it up right now
Approx 227 mile range, so its got me from Seattle to Troutdale (with a lunch stop and to see something called "Nutty Narrows" in Long view I think) with around 26 miles left.
Handily, there's some "hyper fast up to 350kw" chargers about 300m from my hotel. Going to take just under an hour to charge (seem to be topping out at 42W tops now saying 215 mins left for the remaining 48%), so probably just under $40, so maybe not really any cheaper than unleaded?)
(Think it's $0.56 per kW)

To be honest, i would personally stick with unleaded if i had the choice. Easy to go anywhere and fill up in a few minutes. Bit of a faff trying to find chargers.
At least in the UK, a lot of supermarkets have them.

The manager who telling people about the wait times,
did mention asking to be comped on a day's rental or fuel. Some of these 4x4 trucks or whatever could cost $200 to fill up and be far less fuel efficient than the 1L Kia you booked....

Added: well, spent just over 140 mins to take it up to 90% (watts dropped from 42kW to just over 7 by that point). Cost $27.xx dollars.
Car is saying range of 148 miles which definitely isn't 90% of 227 (unless it adjusts).