These are very well priced dig/metal servos.They are not top-shelf quality but deliver what you expect from a dig/metal 13g servo,has decent strength, not as torky as others I have but high enuf.speed is OK,gear train is tight.Basically delivers what you need from a 13g dig/metal servo.I will most likely buy more unless I need replacement of my better dig/metal servos.Nice,decently priced servo.Can't complain or have any negatives about these servos.