Here's my tuppence worth from my very short experience of my new MG4...
It's lovely to drive.
Easily get over 200 miles motorway on a single charge with room to spare.
I switch off the lane keep assist, it's a pain, does to many unexpected random braking, warnings and course corrections.
Learn how the steering wheel buttons work, they're a godsend for the Aircon and radio, the main screen is too fiddly when driving.
The traffic jam assistant isn't great, if you use it remember to switch it back to cruise control when you speed up or you'll think your steering is broken.
If your charging cable is stuck and you can't remove it, lock then unlock the car.
My last car was a petrol Merc, the MG is way better, smoother, faster.