Actually the model number is the following - your dropdown box did not have the number listed: 500801291-1-20. The mattress is very firm and comfortable. Enjoy it!

Just what I was looking for and sleeps wonderfully.

Good back support for a restful sleep.

[This review was collected as part of a promotion.] So we love our extra firm serta mattress! My husband was at the point of sleeping on the floor since his back was so bad. We switched mattresses and this has helped him tremendously! They even took our old mattress, free of charge!

[This review was collected as part of a promotion.] Ever since I started sleeping on this mattress, I have noticed so much difference in my sleep quality. It is the perfect kind of firm for my body type. I always had some discomfort and when I wake up in the morning, my body was very stiff but to my wonder with this mattress i did it had any such feeling. I feel so rested and my body never felt so relaxed and happy. I don't like the mattress that Si k in and makes it difficult to turn, with this mattress there was no problem and I could easily turn. It feels very comfortable, even if it firm and I had the most relaxed and comfortable sleep. It provides great support to the back while you are sleep and adheres to the body very well. I have a very busy work style and on my feet throughout the day, so I need something that gives my back required support and give well rested sleep so I wake up fresh and energized for the next morning. Overall, I am very pleased with the design, qulaity and comfort I get through this mattress.

[This review was collected as part of a promotion.] Daughter has acute back problems, hoping this mattress would give some relief, she said it was amazing! Actually allows her to get a good night sleep with out tossing and turning all night, which helps her husband sleep as well! Good Night!

[This review was collected as part of a promotion.] The mattress is so comfortable. It is nice and firm but also forms to your body but not so much where it sags. I have back pain so this mattress was a great equal of firmness and comfort. Its hard enough not to make my body sink into it but also not so hard that I feel like I'm laying on stone floor.

[This review was collected as part of a promotion.] This mattress was somewhat more firm than our previous mattress. But I have found that to be a plus. I also believe that when I toss and turn it does not seem to shake the whole bed. Another bonus is the fitted sheet seem to stay on better

It is better than a worn out mattress, for sure. That said, it feels lightweight and flimsy compared to our old mattress in its prime. Furthermore, we have been using it two months and already need to flip and rotate it because you can tell my husband and I have our one spot each, that we sleep in, I think it's too soon to need to do that, and to actually be able to discern the lump in the middle, upon which no one sleeps. If I had to do over, I certainly wouldn't have paid as much as I did, and likely would have chosen a different mattress altogether.

This Mattress is supposed to be an adjustable base compatible. When we lift the mattress up it makes a big bulky crease in middle that you can't sleep on it. The mattress does not smooth out when in bed. You can't sleep on it.