I've just ordered a 90D, after years of waiting/planning. I've taken at least 4 test drives over the past 5 years. During my first test drive I went with friends, and spent some time riding in the rear seat. I didn't find it sumptuous, but it was comfortable (if tight on legroom), and I do not recall having headroom issues. I'm 6'3" and my height is expressed mainly in the form of long legs. I've only been interested in models with the sun roof, in large measure because of the added headroom. In my latest test drive, I remained very pleased with the front seat experience, but when I sat in the back my head contacted the rounded horizontal element of the roof structure at the back of the sunroof (it runs just inches above the headrests for the rear seats). The only work-around for me was to slouch in the seat. My conclusion is that comfort and safety for tall folks will be compromised in the rear seats, disappointing in such an expensive vehicle. I realize the X has much better headroom, but I'm simply not interested in the X, for multiple reasons. I do not recall having such a pronounced rear-seat headroom issue in my previous tests. I realize that the S has sported at least three different seat designs since its inception. The current headroom squeeze would be improved if the rear seats were moved forward a few inches. Others must have observed this problem -- does anyone have suggestions for remediation?