The Safe-T-Plus is basically a spring-loaded and damped centering device. My experience was like that of Hiker; mostly what it did was remove the play in the steering wheel. However, that "looseness" in the steering led to a certain amount of wander as I drove along, which was made worse in cross-winds, especially gusty cross-winds, so the Safe-T-Plus does seem to help in that regard. For my unit (short wheelbase with excessive rear overhang), I think adding a rear track bar provided a greater improvement in stability in cross-winds than the Safe-T-Plus.
