[Widan]

I understand Newell add Easisteer and Stabilride to the coaches in 2013 or so, I understand how booth systems work and i see Newell can ad EasiSteer to older coaches for around $6500.00. As anyone done this or have driven a coach with and without this system that can tell me how big of a difference it makes? I think Newmar calls in Comfort steer. How about the Stabilride system, is this also an upgrade you can add? Thanks for any comments 
Dan