I give 5 stars for comfort but 1 star for coolness. It does have an odor upon opening, but goes away rather quickly. It would be a perfect topper if only it was cool.

I have yet to sleep on this so I can't review it for comfort. I bought this in store and when I unrolled it, it smells so terribly like fish, I don't know when I'll be able to sleep on it.

[This review was collected as part of a promotion.] When we came across this mattress topper, it was very convenient that our 15 year old son just mentioned he didn't think his mattress was as comfortable as his brother's (who recently got a new one). After laying on this mattress topper (even on the ground) he mentioned it was like sinking into a cloud. Once we put this topper on his mattress, he was hooked. So, long story short, getting this topper has extended the life of our current mattress since we didn't The best part of this topper is that is not nearly as thick and bulky as other mattress toppers we've used but WAY more comfortable than standard mattress pads. My son definitely noticed the cooling feature as well since he has a fan on near his bed and he mentioned the cooling sensation when he first gets into bed now. Outstanding product! There's no doubt that we'll be looking to get this topper for our master bedroom soon!

[This review was collected as part of a promotion.] This topper has transformed an older uncomfortable mattress into a new one. Forms to your body and doesnt get too hot throughout the night. My son loves it and I had to give it a try to also see how it was.

[This review was collected as part of a promotion.] You will notice the quality of this topper as soon as you pick it up, it's heavier and more dense. I buy toppers for all my beds as it just a closer feel to contouring and it helps with pressure points in my shoulder. Some sink and do very little even though they may have a nice height, this topper on the other hand supports and contours around me. Super comfy and not hot to sleep on.

[This review was collected as part of a promotion.] I purchased this hoping it would bring relief to my body from all the pain that hinders me throughout my day. At first I felt that it was going to be a waste, but as soon as it was unraveled from the packaging I realized it was a great idea. It came tightly packed and easy to set up. It also came with its own protective cover. After several days of laying on it I felt much better sleeping and waking up in the morning. The cooling sensation helps to treat my pains also. It’s not like all the other foam toppers you use that get hot after lying in the same spot. This one stays cool for a long period. Overall it appears to be very durable and won’t loose the memory of the pad. Also it seems like it’s going to last longer than any other brand.

[This review was collected as part of a promotion.] Our upstairs guest room queen bed is in sure need of a new mattress; it’s old, thin, flimsy, you name it. Unfortunately, a great new mattress is far down on the budget list right now, but both mine and my husband’s back are having major issues such as sciatica. We have to sleep in this bed when we have a night nurse for our medically fragile baby so it’s pretty crucial we have much better sleeping support. I also have a major issue where I fall asleep cold but wake from sleep hot and drenched in sweat, so I was very hopeful that this new Serta Cool Nights 3” mattress topper would be the perfect interim solution to address all our needs. The gel memory foam topper arrives compressed and rolled into a compact square box that has a solid weight to it. The memory foam is rolled open while laid flat on the bed so it can naturally spread out and expand to its full size. The new smell goes away quickly and what’s left is a new bed that comes with a zippered protective cover. The new gel heat regulating tech truly kept my core cold and helped me sleep better after just one night, and the memory foam that learns your body shape and support needs feels like heaven. It can take the full 2 days to expand to its full potential and sleeping on it speeds up that process, so I can’t wait to update my thoughts after more than a week or so of sleeping on it.

[This review was collected as part of a promotion.] I absolutely love this mattress topper it makes for a very easy night it is extremely soft and comfortable. It fits the bed wonderfully and even came with a cover to help protect it. I absolutely love it best night sleep I have had in awhile

[This review was collected as part of a promotion.] My husband bought a mattress for our guest room but he insisted on getting a firm one for his mother. Unfortunately he didn’t get firm, he got hard as a brick. This mattress topper is the perfect combination of softness and coolness!

[This review was collected as part of a promotion.] I love this Serta cool nights topper it’s easy to set up and is so comfortable keeps me cool at night and also holds heat well the cover it comes with is very nice too I highly suggest picking one up the price and quality is amazing for what you get