I have a new 13' with the autobrake controller. It works very well. I was having an issue and called the support line at autobrake. They are great and very responsive. In the course of troubleshooting, he was surprised that the unit is power when disconnected from the tv. Scamp apparently connected it to the battery rather than the power line from the tv. I now see in the autobrake instructions and underlined statement to not hook it up to the trailer battery. He explained that it can then draw power when the trailer is parked and if the battery charge drops a bit, the autobrake will stop working.
Just a heads up. I'm going to call Scamp tomorrow but will go ahead and change the connection in the wiring box.