The cool blue definitely keeps you cooler than most memory foams as they can be quite hot in summer months. The springs take a few days to fully open out as it comes vacuum packed brilliant for getting it up the stairs! Very comfortable but I wish is was just higher. This matress leaves a couple of inches gap at the foot of our bed but we like that as we can tuck our quilt into the bottom of the bed for a seamless look without breaking a nail or scraping your hand! Only criticism is I would have picked a higher matress!