How well does this mattress isolate a partner's movement?

Better than its tier suggests, scoring 7.9 on motion isolation. Peak transfer sits in the 2.74 to 6.29 m/s2 range and settles inside about a second. The 815 coils each flex in their own fabric pocket instead of carrying movement across a linked grid, and the half-inch of memory foam dampens whatever is left. For couples shopping the value end of the lineup, that is a genuinely solid result for keeping a restless partner on their own side.