Hopkins Agility electric brake controller problem

Hopkins Agility is the brand name. Yes, brakes on fiver are adjusted and work well when controller is manually activated. Yes, it is an inertial type controller. Are you saying the controller is just a POS, and to ditch it? Are they junk? It's a $100 controller, was hoping to figure this out, not just chuck money in the trash. Do you have experience that indicates these are crap? If you do, I'd gladly hear more about them.
Again, Thanks for any and all advice, Larry