We bought a Motorhome this year and a Honda CR
. I chose RVi supplemental brake system.
Their on line videos sold me-- easy in and out of car, size is small. I bought there battery maintainer also, it works great, now I don't have to mess with the fuse. Made for the CRV.
You have to buy a seven to six wire plug connector though, but it's worth the cost.
Left cold Colorado yesterday for warm Arizona.