Given that Calvert sells them I would bet they work pretty well on the track.
The sliders just replace the rear shackles. They let the springs react faster, they just operate without binding. If you match the slider track angle to the angle of the springs, they also let the springs move as they’re supposed to instead of forcing them into an arc like the shackles do. Now if you change the height of the rear eye with how you mount the sliders that’ll change the geometry which can effect how the car leaves. But that’s not the slider, that’s the change in geometry.