How good is this mattress for couples and motion?

Very good for motion, scoring 8.0. All-foam construction is what isolates movement best: with no springs to carry energy sideways, the foam absorbs a partner's motion right where it happens, settling in about half a second. Someone rolling over or getting up at odd hours barely disturbs the other side. The edge holds up reasonably for foam too, scoring 8.5, though it softens more under direct weight than a coil-encased bed would.