The luxe motor type rapidly supplanted the older aak and tjalk hull styles, offering straighter sides, a wider beam and lengths which exceeded the largest examples of the older hull styles, all of which contributed to a greater cargo capacity. In addition the "duck tail" transom, prop and rudder arrangement was better suited to diesel propulsion than the sail-optimised hulls of older types, though they do suffer from a pronounced "walk" effect when running aft. Typically they can carry 6-9 knots through water, the hydrodynamics of the hull not being suited to higher speeds.
In commercial use the hold was originally covered by duck boards, wooden panels which could be removed to expose the hold for loading. This would then be covered with a tarpaulin. In the postwar period many adopted steel hatches instead for speed and longevity.