Below is a YouTube video from a couple that does full time living.
They recently installed Sumo Springs on their class a and found
The upgrade to be terrific. Also, they mentioned an article
In Motorhome Magazine too.
below is some comments from IVR2 forum:
Sumos will really help with the side to side & up and down rocking, like when you leave a gas station. They'll really help. Also, you might first search the forum for the CHF (cheap handling fix) and try that. It's just a sway bar adjustment. Sumos on all 4 wheels will run around $1300, the CHF is free.
You might also research shocks. I have Bilsteins on my MH, but have read about how goodKonis are. Some people say the Konis made a big improvement in the ride. If I ever see them on sale I just might change to Konis.
I've come to the conclusion that with the Safe-T-Plus and the Sumos the ride & handling of my F53 is about as good as it can get. Those upgrades changed it from acceptable to pretty good. It's a joy to drive & with the 5 Star Tune, the V-10 is pretty tame in hilly country
Sumos will really help with the side to side & up and down rocking, like when you leave a gas station. They'll really help.