Active seat in the mini

I’d like to ask about your experience with the car seat in new Mini’s. Since I’m only supposed to get mine in November and there are unfortunately no vehicles with this equipment at surrounding dealers, I would like to ask you about your experience with the car seat. Have just read an article, probably from the USA it is also installed a ventilation. Is it really like this or is it market-dependent again? How is the massage function? This is especially important to me because I have to complain back problems. e. Would be happy about any experience! Thank you!!!