Yea i have the built in TX/RX fail safe set. All my gear is sorted, as far as radio, servos, batts, and what-knots. I'm here looking for that little extra insurance. If it just not needed, what I've always thought and the reason I know so little about the devices, then its really not a pill i have to swallow. However, if it is good cheap added insurance then i would surly get one.