We got one a couple years ago. I got both the manual and automatic head catch. First year I used the manual one it about killed my arm, but they never backed up and went right out. Also the manual headgate works wonderful for doctoring or eartaggin larger animals. Sure immobilizes them.
I've been using the automatic head gate for testing since. Then use a hot shot lightly if they don't go forwards. I also added a longer release bar going to the automatic headgate, so the tester don't have to reach as far. It's got the palp cage also. We tested 340 range cows in just 3 hours with one a couple of weeks ago and never missed a cow. It sure does everything we need it to do.