I purchased a ReadyBrake for our 2014 Jeep Patriot and then discovered it would not work due to the routing of various brake, coolant and other items up against the firewall which prevented routing the braking cable. Something very unexpected and definitely unanticipated. Fortunately the outfit I bought it from agreed on the return.
Picked up the RViBrake2 system off EBay for a really good deal and while its only been about 6000 miles there have been absolutely no problems. Their customer service is superb and will take the time to answer even my most stupid questions. Quick and easy setup, not dependent on tow bar.
So, I wholeheartedly give a thumbs up to RViBrake2.
I will also give a thumbs up to the ReadyBrake if your rig is compatible and you are able to string a cable through your firewall.