I just had one installed this week on my 2015 Fleetwood Expedition 38K. It gives the steering more of an "automotive" feel, with less feeling of free play and fewer small steering corrections needed. I don't feel potholes or pavement breaks through the wheel nearly as much as before.
It does reduce the push from passing trucks, but doesn't eliminate it. Correcting from the push is definitely easier.
Overall, I notice the difference and I like it!