I tried using the slide stabilizers at one point.
Results were minimal, so I discontinued using them. Plus as someone else mentioned many warn against it. If your hydraulic jacks leak or tires lose air and your rig shifts, you stand a slight chance of damaging your slides.
What works better IMHO, is if you don't have a 6 pt Levelup, mount two scissor jacks right in front of the wheels.
After I level the rig, I lower the middle jacks and they really firm up the rig and minimize side to side rocking. A great fix for seventy five bucks. I also have JT's stabilizers. With all that down and locked the rig is very solid. Trace