What are the advantages and disadvantages of Servo Systems (Servo motors)?

Servo systems - Three phase AC current generates a magnetic field.The system continuously monitors position relative to commanded position and adjusts current and voltage accordingly

Advantages of Servo system -

Closed loop control Higher torque at higher speed Very efficient - lower motor heating Better choice for variable load system

Disadvantages of Servo system-

More complex control - tuning required Position feedback required -increase cost Higher overall system cost

Any ideas about the servo package market share in India? I heard that Fanuc, Simens are most famous.