ya I have one and had no problems with my last toy hauler and before I hooked up and towed my current I had the batt disconnected to install some gauges. took off with the toy hauler and every time I went to stop it would hit the brakes almost felt like it was going to lock them up then it would release then hit them again then stop all together and the slower I was going the worse this issue got. when I got to the site I unplugged it and let it sit for a couple day then re-connected it and went through the set up again and that's when I noticed it was set by default in hydro/electric rather than electric only so I changed it and all went away and worked good again. It actually works better on boost 1 for my 2011 295 wolf pack toy hauler loaded which is just over 10k lbs than it did on my last '06 30 wp bumper hitch toy hauler which had to be in boost 2 mode, the 30 wp weighed less but had 4 wheel brakes that worked good as well so who knows. disconnect it and go through the set up again and check the hydro/electric setting. hope that works for ya too.
'99 f350, quad cab long box, dually, 6 speed manual, gently mod'd.
2011 wolf pack 295 with full susp now!