Brushless DC motors have no brushes to get worn out, they represent a huge leap forward in technology. Brushless output significantly higher efficiency and performance, and have a lower susceptibility to mechanical wear than their brushed counterparts. I always recommend to apply a thread locker to the pinion grub screw.
Brushless motors offer several other advantages, including;
Higher torque to weight ratio
Increased torque per watt of power input (increased efficiency)
Increased reliability and lower maintenance requirements
Reduced operational and mechanical noise
Longer lifespan (no brush and commutator erosion)
Elimination of ionizing sparks from the commutator (ESD)
Near-elimination of electromagnetic interferance (EMI)
What to expect:
Results similar to a BRUSHED 30K motor in Rounds Per Second but HALF the amperage useage AND MORE torque!