Received our new 90D ten days ago (second Tesla Model S in the family) and drove over 700 miles round trip to Las Vegas. We had thought the new next gen seats were bolstered too high when we were ordering the car and had requested the older seats. We were told that they could not provide the older seats and that the bolstering would soften or 'break down' over time. Now I can confirm that the extra bolstering for the back and bottom in the name of venting or comfort or whatever else was just bad and not adequately tested by normal sized drivers! I do not have a big seat bottom and I am not tall - and by the end of the first 300 miles to LV I was hurting in the right leg and back from the hard and deep bolstering. It feels worse in auto-steer operation because the driver's leg is less extended (since it is not on the accelerator/brake) and is then feeling the right side seat bolstering. For those taller than me and of normal frame, this will be a bad design. I want these front two seats replaced. Any suggestions and experience with this issue? Otherwise we love our 2 Tesla's. And the auto-steer is great.