I purchased the 3" topper 6 weeks ago as a solution to my uncomfortable bed. I noticed an immediate improvement. Here is a list of my observations so far. * The mattress topper is soft but firm enough that I don't feel like I'm sunk into a hole. * I don't feel a 'cooling' effect But, It does not retain heat, which is perfect for me. I also have a mattress pad over the topper, which I will remove once the nights get warmer. I will update if I notice a difference. * It took my body a few weeks to adjust. At first, I woke up with neck pain. I realized that my neck was positioned differently and that I needed a different type of pillow than I used without the topper. No more neck pain. * I was nervous about this purchase because I've had bad experiences with toppers and mattresses in the past. Sam's Club return policy have me the peace of mind to give it a try, and I am so glad that I did. * I recommend rotating the topper regularly.

I purchased this about 5 months ago. We had just purchased a new temper pedic bed to replace a 15 year old temper pedic bed. Without going into the long detail we ended up with a firm temper pedic mattress which was like sleeping on concrete. My wife and I both woke up in pain. We were told the mattress pad would not make a soft mattress firm but could make a firm mattress softer which is what it did. The topper has been great. Adds the right amount of cushion. Temperature wise, it is about the same as our old temper pedic. It starts out cool and warms up but not bad. I would buy again.

I've been using this memory foam topper for about a month now and it's just what I needed. My mattress is too firm and I was considering buying a new one because my back would often times hurt when I woke up. I decided to try this memory foam topper and it's done the trick. It provides the support I needed for my back and its very comfortable. I rarely do reviews, but wanted to share my success with this topper.

I couldn’t be happier with my purchase of the Serta 3” Cool Nights Gel Memory Foam Mattress Topper! From the very first night, I noticed a huge improvement in my sleep quality. The gel memory foam strikes the perfect balance between soft cushioning and firm support — it contours to my body without making me sink in too much. It feels like I bought a brand-new mattress for a fraction of the price.

Good, but not as dense a product as of a few years ago.

I don't get a clear cooling effect. The topper is 2 inches short on both sides and ends

I bought it for my guess room its super comfortable

Lives up to its description.

Incredibly comfortable! I would highly recommend this mattress topper for both comfort and Price!

Item came as described and fit a california king sleep number well.