I noticed a difference on my Outlaw after installing them. We actually think there is less noise from things rattling around when we hit bumps. It also greatly helps with the jolts and porpoising effect.
I drove my Windsport 34J for about 2 months before installing Sumo Springs. What a difference it made in the ride. I little more firm, but handling was greatly improved. Thinking of doing the Koni Shock upgrade.
You did a test drive yet? What's your impressions?
I installed the Sumo Springs on my 2018 Thor Siesta three months ago. Easy install. I used the coach hydraulic levelers and a bottle jack for safety to remove the factory bumper stops. Took off on a 5 week road trip across 13 states and they made a huge difference. Reduced side sway and the dragging going out of simple driveways. They were very easy to install. Took about an hour total time. A reasonable modification (around $300).