So far so good using them in 60 size planes with no problem. Gobs of torque, center well, no complaints. A little skeptical to start with because of the low price. Used a full set on my mule plane for starters to try first. Went ahead and ordered enough to replace all servos on remaining planes. Buy a few to try and you will be ordering more I can assure you. They may go out at any time but what servo won't. JR and Futaba do not work any better and for the value these can't be beat.