OMG!! this mattress is AMAZING.I decided to to sleep on it after the 72 hours when it has retained its full shape.well, i went to bed for a 6 hour sleep and then timed traveled to another dimension and when i woke up my body was rested for about 10 hours instead of 6.so in essence i gained 4 hours of sleep with this mattress. OMG! i just love love love it.it is not very soft and not too firm. your body temp helps depresses the mattress and allows it to fully contour to you body.with this mattress, you will sleep for less hours but rest your body for more hours.for this price tag, totally worth it.this is a piece of luxury.thank you overstock.highly recommend this to anyone.