I have had the F30 for 2 months and I drive around 3500-4000mi a month. I have since learned that the seats are a horrible design and not built for those with height or carry that height in the torso.
For some reason they have curved the top of the seat out instead of leaving it flat all the way to the top. What this does for those that the thoracic spine area hits right in the middle of the top of the seat (it hits me right in the middle of the shoulder blades) is hunches us over and creates horrible neck and shoulder pain.
I knew the 30min test drive would come back and bite me.
The E90 335i and M3 seats are flat in this area and it didn't cause an issue.
I will either have to install the F80 seats in my car (and look like a poser) or just buy and F80 and drive it 4000miles a month
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T