It's not difficult to install the Safe T Plus, however it might take two or three adjustments to get it set correctly. Install, test dive, adjust if necessary, test drive, adjust again if necessary... you want the motorhome to track straight when on a level road.
Check out the Henderson's Lineup website. I think they invented the Safe T Plus, and they have some good info and videos on their site. I had them install my Safe T Plus along with front and rear auxillary sway bars, rear track bar and Koni FSD shocks, These guys are experts when it comes to motorhome suspensions.