If these drives/motors are sized correctly for the machine then they match servos for accurecy and absolutley blow them away for ease of use.
Absolutly 100% agree there Jazz, that type of upgrade to steppers and drivers is a game changer.

Twinning an X, Accurate Z position over large time running jobs, 4th and 5th Axis positional holding. any CNCing that your likley to loose steps.