The hooks are hand-tied with an assist rope and the total length of the rig is longer than the original hooks.
On some models (particularly small <6 cm lures) and some casts, it is possible for the assists to catch on to each other. It is necessary to make taut casts to reduce this problem.
This is a possible disadvantage, but the main advantage, which is freedom of rotation during fights, makes it possible to strongly reduce stalls.