I ran my dx4r and Savox servo for 2 years with never one single brown out. Maybe I'm lucky but I have a glitch buster in my bag just in case because of what so many people said about this known issue and never one time! Yay for me I guess but Savox make some great servos at awesome prices compared to Sanwa (which I run now with my M12s) and other brands where you can spend $250 on a servo and get an identical one for $99

I say make or buy a 5$ glitch buster and in a lot of cases that's all a lot not all of people needed to fix the brown outs.