I just bought a F55s. I love it except the sport seats are a problem, a big problem. The bolsters on the upper part of the seat are great, but the bolsters on the bottom part of the seat are extremely uncomfortable after driving for about 30 minutes. Your legs naturally roll outwards, unfortunately the bolsters are very stiff and cut into your thighs. On a quick drive, you don't notice it, but after about 30 minutes, I find myself shifting around trying to relieve the pressure on my thighs. I would definitely take a long test ride before buying the sport seats. I have registered complaints with the dealership and with Mini through the website.
Otherwise, the car is great.
Otherwise, the car is great.