A guitar’s tuning reaction to a broken string while using the Guitar NutBuster® will not change and remains the same as it was prior to using it.
If the tremolo system is set to be non-floating (tremolo bar can only move downward) or if the guitar does not have a tremolo system installed then the guitar will not go out of tune if a string is broken as normal.
However, if the guitar has a tremolo system that is set up to be floating (tremolo bar can move both upward and downward) then the guitar will likely go out of tune if a string is broken as normal.