Does this europillowtop feel springy or like a deep sink?

A deep sink, by design. Bounce travel lands near the low end of its range because 5.75 inches of soft conforming foam sit over the coils, so you settle into the surface more than you spring off it. The pocketed coils still lend enough underlying liveliness to reposition without feeling stuck, but recovery runs relaxed. If you want a fast, athletic push-back, this leans softer and slower; if you want to be cradled, it delivers.