I have two of them with about 40 flights on one and 9 on the second and they are both fine, except for the connector problem (see "Turnigy alert" thread). So far there has been no connector problem with the low-time one.
Turnigy motors are smooth running and seem to pull fine. A good bargain for the price, especially from Hobby King.
I've never flown a high-buck motor, so I might change my tune if I had the experience. All of the motors I've used, Rimfire, Turnigy and E-flite have been smooth and in-balance to the degree that prop vibration is a bigger component of the overall buzz than the bare motor vibration.
So far, no issues with stress on the motor in hard maneuvers. I would note, that the motors I have all have two bearings at the prop shaft end -- opposite the stator end. If you turn the motor around and mount the prop on the stator end of the motor, you just have one bearing carrying the loads.
John