So I've now tested this mattress for about a week my essentials thoughts are it's very great quality and Durable. 
They definitely take the time to assure there products serta has the top notch quality made mattress they note every detail to what is important in a mattress. 
It's cool to the body definitely air flow. The amount of firmness is just right for perfect sleep.
Double padded for cushion I battle with too soft mattress this mattress has the perfect amount of cushion with firmness it has the perfect balance. I highly recommend this mattress serta is top quality the perfect sleep is in one mattress.