I copied this from the Cirkus forum. I personally use whatever the job takes be it JR, Futaba or Hitec and have had few problems with any of them plus I have about 12 5945s.
Now, I've got a dozen 8611a's on my new airplane. I was just in the setting up stage where I finally got all the throws dialed in. I did the old servo test method.. you know, throwing the sticks up, down and all around manually. Did this for about 10 minutes when one of the ailerons stopped working. I found one 8611a locked. Disconnected that one and found the other two were free wheeling but not doing anything. So, all went back to Horizon. Apparently, one servo froze (motor) and that in turn, caused the amplifiers on the other two to go out. Brand new, out of the box. Go figure.