We have an Invisibrake on our ACE and Cherokee toad, plug it in and go.
We had a problem with our Invisibrake control box. Pump went bad. Roadmaster rebuilt the unit and so far no new issues.
The Invisbrake has a toad battery charge system. You turn on the MH parking lights to energize the charge pin on the plug. Only issue I have with this is the ACE has no warning bell to remind you the lights are on. I put a twist tie pipe cleaner around the steering wheel to remind me the lights are on. Eventually I may get accustomed to checking the headlight switch is off or maybe not