If you look at the attached image, you notice that the speed, the current road and the compass direction are displayed at the bottom of the screen. Being a motorcyclist, my iPhone is under my line of view. Each time I look at it, my eyes have to quit the horizon. Although only a couple of inches are involved, I would prefer these infos at the top of the screen for my eyes to travel less. Maybe a setting could implement that.
Moreover, in the context that my iPhone is mounted on a vibrating handlebar, the characters showing the speed or the direction are not big enough (or not thick enough) to communicate this info. Bigger and bolder would be welcomed.