How does motion isolation work for couples on this mattress?

It scores 7.4 for motion isolation, a good-to-very-good result that keeps a restless partner from waking you most nights as the thick foam core absorbs movement. Being honest, that reads slightly lower than Serta memory-foam beds because the doubled latex comfort layer is springier and passes a hair more motion. For most couples it isolates well; light sleepers wanting maximum deadening may prefer a memory-foam build.