The Serta Perfect Sleeper Midsummer Nights Firm mattress is truly a DREAM, pun intended. It’s my favorite level of support: hard, but still with some cushion. It’s a goldilocks bed, it’s just right! I love how it feels like it rises up to support my body. That really helps my muscles relax and know the bed is cradling me. It’s a wonderful sensation. I’m really happy and pleasantly surprised that even though this is a spring mattress, it doesn’t transfer much movement at all. When two people are on the bed you can barely tell when the other is shifting or rolling over. That’s a huge improvement over my last spring mattress. The quilted top makes it feel so soft and cushy too! I haven’t noticed any issues with overheating with this mattress either. It’s been nice and cool and I find I’m getting much better sleep now that I’ve switched. I highly recommend it!