I've got close to 50 of these in my larger planes (30 - 50cc gas) and have yet to have a servo malfunction. Set them up properly and nothing seems to trip them up. I don't fly all that aggressively, so slightly slower speed is un-noticed. On the large control surfaces, I was concerned about their having the strength, but time has shown me that it's not a problem. I plan on continuing to use these as my primary choice for future projects.