How well does the Modern Series 8" isolate motion for couples?

Very well, scoring 7.8 out of 10 with measured peak motion around 2.68 m/s2. As an all-foam bed with no springs to carry vibration, a partner rolling over or slipping out at night stays on their own side, and what little registers fades in about half a second rather than rippling across. The dense foam core absorbs movement on the spot, making this an easy, low-cost pick for light sleepers sharing a bed.