I've tried the pass and rear seat, the pass is a little better but not by much the rear is better than both but still not firm enough, maybe is the way they were designed, I rented an 04 trailblazer the other day and found the seat extremely confortable, very firm up to the last inch of padding then they get a little softer to avoid sore spots, I just wish I could get the benz to feel that way but I do know there's a 18 year difference and designers now use computer modeling to get the right firmness and shape, I think is called biomechanics (interaction between man and machine). Every other feature on these seats is great, mines have 10 way power adj, power headrest, they are heated and also have the multi adj lumbar support.