We drove oer 200 miles today over both rough and smooth roads. Lots of bumps.
We have made this trip about a dozen times.
The Sumo springs made a very nice difference. Much less porpoising and each event was only one to two mild ones. No jarring bumps from the rear as we had in the past.
I still felt pressure from some passing trucks, busses and a class A. But many did not affect us.
The only possible negative thing to report was that I was having a very difficult time fighting the cross wind. However the wind was brutal today. I was being blown into adjacent lanes. In less windy areas it was a pleasure to drive. I don't blame the Sumo springs for the wind issues, they may have even helped.
And now that I think about it no banging noise from the shower door after I forgot to replace my "foam tube fix" and the mattress barely moved during the trip.