Richard ,I had a test drive in one of the factory demonstrators in November last year, the car was some 4/ 5 months old when I drove it so it would have been the original seat that has been so heavily criticised. I drove the car for around an hour and have to say I did not feel at all fatigued. However I was so amazed at the quality of the chassis and the ride it gave me that perhaps it blinded me to any aches and pains! I had planned to drive both auto and manual but was so taken with auto box up first that I didn’t bother with the manual,something which I thought would never happen. It has to be said I am 5ft 11 inches tall and weigh around 70 KG , I’m guessing that ,what can I say people of more generous proportions might have fared differently. I did notice that with the drivers seat set in a comfortable driving position there seemed less room to behind to put luggage than my old Plus 4, but didn’t measure it.
Hope that helps