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.] My wife and I recently tried this iComfortECO Q10 Extra Firm. We never had a firm mattress before but we honestly love it. We both wake up feeling good and have no back pain which we previously were dealing with. I definitely recommend if you are hesitant to give it a try.

[This review was collected as part of a promotion.] We are in total love with this mattress. The iComfort Q10 Extra Firm is pure perfection to sleep on. The gentlemen who delivered and set it up were the nicest. I know going up a narrow staircase was not easy. This mattress has phenomenal total body support. My husband and I truly wake up so well rested. Our previous mattress did not come close to the perfection that is this mattress. I am happy to wake up, and start my day , we truly have the best sleep ever. Love love love this mattress. Our Australian Shepherd loves it too. Ultimate comfort and sleeping pleasure. Excellent delivery and a superior mattress. Highly recommend.

[This review was collected as part of a promotion.] So happy to receive my new Serta iComfortECO Q10 Extra Firm. I was in need of a bed and to have received this was a blessing. It is so comfortable. When I lay down I feel like I'm melting into the bed. The firmness is so amazing.

[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.