Have done a little over 2000 miles in our SE SR, and over Christmas completed our first long distance journey (Norfolk to South Wales and back again). So here's my tuppence:
I love driving the MG4. I'm far less energetic with my driving than I was twenty years ago with my Metro, but the MG will happily do both enthusiastic and relaxed driving.
Plenty of space in the boot and the cabin.
The EV experience.
The range. Stopped twice on the way down to Wales, once on the way back up. Mainly because I needed to arrive in Wales with charge. Both journeys were very smooth. Had a five minute wait at Rugby for an available charger on Christmas Eve. But by the time we'd eaten, drunk and peed the car was ready. We've absolutely no need for more range than we've got.
Things which could improve: (mostly small niggles)
(Car) Scheduled charging hours wrong frequently. I think I've worked out the process now, but it didn't be as temperamental as it is.
The speed recognition is wrong more often than it's right and is just a distraction.
I'd like somewhere for my flask!
And the big one, I'm sorry but the seats are poor. My wife is constantly travel sick because of the aggressive head restraint and whilst I'm pretty tolerant, I'm starting to resent my seat a little. Before anyone talks about safety over comfort, the regulations are obviously designed by and for people who aren't 5 ft 6 (which BTW is average size for a woman so not crazily short). It pushes my other half head forward in a way no-one would like. TBF, this is a common issue. But it's the one I need to fix for us to be happy with the car.
Oh, and she doesn't like the wide 'step' to disembark.