I bought 6 of these servos to put in a ARF Dago Red by World Models that a friend gave me because he never found time to build it. and all six of them worked flawlessly! centers very well too. I've used many Towerpro mg90s and sg90 micro servos on electric parkflyers with no issues. this was the first purchase of a standard size servo and I was impressed with the quality and value of these servos! If you need a large standard size servo that has plenty of torque and centers well(not real fast, like for 3D) but looking for something for normal flying, hit buy on these! you will be pleased..