I see how much depends upon your build, height, etc. I like the CX herringbone seats very much. But I'm 5'10" 170# & fit. Although I like some things about the overall BA seat, it is NOT truly flat -- the head is at a slight angle. And for someone like me who at times sleeps like a turtle (face down), it is almost impossible to lay flat face down in the BA seat -- but not the AA J seat.