Does this mattress feel springy or settling?

Settling and conforming, not springy, by design. Responsiveness still scores 9.8 on recovery: rather than pushing back, the soft poly comfort layer yields gently and cradles as you lie down, then reforms in under 3 seconds so repositioning never feels like wading through quicksand. If you want an athletic surface you spring off when you move, a slow-conforming foam build like this leans the opposite way. If you like to settle in and stay put, it suits you.