"I have needed a servo motor for a very long time, so I can use it for rc cars. When it arrived it was working great, and I controlled it through an SBrick as well. But after a few days of using it, it developed a problem: when it returns back to the center, it goes crazy and starts to move in all different directions. Even the stop button on the speed remote doesn’t stop it from doing that. I do suggest it for LEGO Technic builds, because most of the time it works great."