How well does this mattress isolate motion for couples?

Very well, scoring 8.7 on motion isolation. Peak transfer registers in the 2.74 to 6.29 m/s2 range and settles within about a second. Each of the 1000 coils is sealed in its own fabric pocket, so they compress one at a time instead of passing movement across a connected grid, and the memory foam on top absorbs whatever energy is left. A restless partner turning over or climbing in late barely reaches your side.