I have them on the rudder, ailerons and flaps on my Facet 2300. No issues (130 flights).
I have them on the elevons, canards, rudder and nose wheel steering in my EuroSport. No issues (40 flights).
All were tested and adjusted with the Hitec programmer before installation.
BTW ...I just bought some more to go into my YA F-15 that I may finish someday.