Hi _Ash_,

Yes, you're right. It could be the posture difference as well, although it's mainly the angle of the seat I think. It's the most uncomfortable seat I've ever sat in as a passenger. Most seats have a lever to move it around more, but this one doesn't go up or down at the front of the seat. It leaves my knees too low and I'm tall so it puts a lot of pressure on my lumbar spine. I do better with my knees bent more.

Usually I use a cushion but I don't like leaving it in the car in the heat and the humidity all the time. When I get out of the passenger seat after a couple of hours in the car, I can barely move. It's quite comical really.