The middle seat's cushioning is harder and you sit a little higher, but the flat floor — there's no center floor hump like many cars have — means more room for your feet. (cars.com)
The 428i Gran Coupe seats five passengers, but a tiny middle seat and large floor hump means it really fits four. (cars.com)
A low floor hump below the center passenger's feet and a bench that's almost as soft and comfortable there as in the outboard positions makes the center seat just as usable as the others. (cars.com)