The saddle stays quite slippery. Which is nice because it helps prevent chafing. Probably as your sit bones make little dents then you won't wander around on the saddle so much. But I have found that it does take a bit of fine fiddling to get the tilt just right, so I am not using my arms to hold myself in the right place.

If you are sliding forward, tilt the nose up. If you are sliding backward, tilt the nose down. If you aren't tending in either direction but just a bit back and forth, probably over a couple hundred miles you'll get enough dents to be more stable.