I have been running mostly the JR line of servo's for the last 4 yrs. Curently running the 9100t, 9100s in buggy and 9100s, ds8711 in truggy. I have owned THE DS8711 servo for almost 3 1/2 yrs. It has been installed in 2 different Truggys and a Buggy. The most durable servo I have ever used. Does not feel quite as fast as the 9100t. Absolutely no complaints.