How is motion isolation for couples on this hybrid?

Good for a hybrid. Motion isolation scores 8.4: each of the 1100 coils is wrapped in its own fabric pocket so a compression on one side does not drag its neighbors, and the memory-foam layer soaks up the rest at the surface. Movement also dies quickly. It will not match the dead-quiet of an all-foam bed, an honest trade for the coil bounce and cooling, but a partner climbing in barely registers on your side.