Nice replacement for a 3" memory foam mattress topper that had run its course. I would have given 5 stars but after two weeks of nightly use it still has not "stretched" out to cover the length of the King size mattress. The owner's manual states that the topper may appear smaller than the mattress and that is normal. It advises to sleep on it and it will stretch out. If it ends up doing so I will update the rating.

I bought one of these a few months ago and wow was it sooo comfy like sleeping on a cloud. So I bought one for my son who has damaged nerves in his legs and wakes up constantly from the pain, he has been sleeping soundly through the whole night since he got it. Then I bought one for my mother-in-law who has arthritis and suffered from restless nights, she too is now sleeping comfortably all night long. Both say they are also sleeping on their backs instead of their sides now too. I suggest opening it on your bed, there is absolutely no smell and you can sleep on it within an hour or two.

This topper is so soft and comfy. No odor whatsoever. This is the second mattress topper I bought. The first one was $15 cheaper. I thought I was being money-wise and saving a few dollars for the same thing. Not so. A month later the first one still had a terrible odor. I returned it and bought the Serta 4" topper instead. No odor from the first night! I couldn't be more pleased. DO NOT try to save fifteen bucks. By this one instead.

We purchased this on hopes to mimic the bed we slept in on a recent vacation. It for sure is very lofty and are satisfied with the description and what we received. Purchased a queen (vacay bed was a king)..that may be where the problem lies. The insert on initial lay down for the night is quite luxurious. I read in bed and looked forward to my time in the bed sinking into my read and softly sinking into the bed! BUT, once going to sleep for the night and once my husband was in bed too I found myself spending the whole night readjusting myself. I was being pulled into the center leaving 1/2 my body in squishy paradise a d the other half in luxury softness. It sounds minimal but just like you can tell if one foot is covered and one foot is uncovered (and you're not looking for "heat relief") its very bothersome. I think (for me) this works if you are alone (in any size bed) or you are sharing a king size bed..those beds are so massive it really is like having your own bed right next to each other. We are average people. 5'7" and 5'11", with normal weights. He is 180 and I am....less (haha). As for the foam being warm..yes, i would say it does make your sleep warmer...but for me i could have dealt with that, its the unlevel feeling from one side of body to other that i couldnt get past. We had this on our bed for almost 4 weeks. I spent several nights moved to couch. I woke up all the other times groggy and unaligned. I REALLY tried to adjust to this. We have removed it and actually cut it down to fit my daughters twin size bed. The verdicts still out. Her first morning actually, yesterday) was not a huge win, we'll see today. I will say its not causing her to wake up any earlier (like me)...she's still a teenager!!

We purchased a king and full size topper just like this one in the past and loved them. However, this full topper we bought for our guest room has a strong, very bad chemical smell. We aired it out for days before putting sheets on the bed. But then we had guests and had to use the bed so I ran a fan and used febreeze to mask the smell a little. Took the sheets off after they left, washed everything because it smelled like the memory foam funk, aired it out for days and thought it was better. I laid on the bed yesterday and smelled it again! Very frustrating!

We got our Serta pillow top, memory foam toppers the end of December. We have an adjustable bed system with two extra long twin mattresses make our king bed. The toppers were very easy to add to our existing mattresses. We could sleep on them that same night with no odor from the foam, and they were nicely plumped to their 4” fullness within hours. They are so comfortable!! We have been sleeping on them for nearly a month, and we have no complaints of any kind. For those that might want to know, the toppers do work very well on adjustable beds. It is easy to recommend this product.

So we used this in our camper to go on top of the very thin and sad camper mattress. We have only used it for 3 nights, but it made sleeping soooo much better! Some reviews said it made people hot, we did not experience that and my husband and I like a cool sleeping environment. As far as smell, we laid it out on our spare bed about 5 days before use, there was a slight chemical smell in the room(almost like new carpet would smell) but when we put it in the camper 5 days later we did not notice it at all.

I've suffered from neck and back pain for over 5 years almost to the point that I could barely stand up straight. I quit seeing a chiropractor because I only felt better for a couple of days after my appointments and then have pain again. One night on this mattress topper and I feel like a new person! I've had this topper for a couple of weeks now and my pain is gone and I feel so much more energetic. I read the reviews before my purchase and thought some sounded too good to be true. This is the best purchase I've ever made.

We purchased a Tempur-pedic over a year ago and made a mistake…we bought extra firm, but due to age, our bodies no longer “like” to lay on a firm mattress. The addition of the Serta “4 inch mattress topper” has certainly helped with that problem. No hesitation, I would purchase again!

Chemical smell is strong out of box & weeks later can still smell. Can smell it in your clothes after sleeping on bed. Also warning labels with product says highly flammable! Still waiting for chemical smell to go away! Love how it feels. Conflicted on weather or not to return. Would recommend a better product without the chemical smell