Together with an unforgiving ride and poor replacement availability at much higher cost....
Sorry to reveal the truth, but the only thing my brother dislikes on his previously owned Mini Cooper is the run flat tyre option.
I specified my F56 Mini Cooper with 16" wheels and am 100% happy with the ride/appearance/performance trade-off.
The previous car and the F56 are like chalk and cheese for ride comfort. I had a Clubman with 17 inch wheels and JCW bodykit and non runflats- ride was very harsh.
I now have F56 Cooper D hatchback on 17 inch Cosmos wheels with runflat tyres and the ride is great. Try and drive one on runflats and then you can make an informed choice.