How is the edge support on such a soft bed?

Solid for a plush build, scoring 9.2 out of 10. A foam-encased coil rings the 800-coil unit so the border resists collapse. Because the top is soft, edge sinkage measures in the 3.0 to 5.1 inch range, more than a firm bed gives when you sit on the side, but the encasement keeps support honest when you lie near the edge. You get usable width without the sense of rolling toward the floor.