The seat base does extend and make the seat really long, longer than my CLA. They look better than in the pictures, only the centre parts on the base and back are cloth. For me the best thing about the car is the driving position and placement of the pedals. I struggle with cronic nerve damage to my right leg and it’s a real struggle to find a car that I can tolerate never mind find comfortable but I found the i4 to be perfect for me. I know it’s horses for courses and everyone’s different, but I can’t wait for it to arrive