I have an Invisibrake on my Honda CRV. The only problem I had was the cheap connector used to connect the wiring to the motorhome. The LT pin was intermittently shorting against the connector frame, causing the fuse to blow. Since I wired my motorhome to combine the brake and turn lights the Invisibrake will only work if both turn signal lights are activated, as with a brake application. Once I replaced the cheap connector, that the dealer told me was supplied by Roadmaster, the system worked very well.
The other consideration is the potential to drain the battery in the toad. Roadmaster says the system will charge the battery, but that’s true only if the running (tail) lights are turned on. I chose to run a separate wire to maintain the battery, and I installed a switch under the dash to turn off the electronic system mounted in the dash, thus the battery stays charged. I’m quite satisfied with the Invisibrake.