Amazon Basics Gel Memory Foam Mattress - Medium Firm Twin Size, Cooling Technology, CertiPUR-US Certified, 75" x 39" x 12", White & Gray - Perfect for Guest Rooms, Dorms & Small Spaces

My stats: 6'1" 200lbs pinched spinal column, sciatic nerve impingement, poor sleeper, hot sleeperAbsolutely LOVE this matress. When it arrived it was well packaged. Upon opening I had doubts it would expand fully. Took it to an open room and cut open vacuum sealed bag. Bed started expanding rapidly. A few hours later and it looked completely expanded but I followed the directions and waited. 72 hours later it was ready. I pressed on the top of the bed and I was worried, it felt stiff almost hard. I then laid on it and my worries went away as it formed around me beautifully. It is firm but very comfortable. The initial smell of plastic was almost completely gone. The first night I we slept on it I did not wake once during the night and awoke feeling really good. I have a bad back and since sleeping on this mattress I have noticed that I awaken with less back pain and stiffness. I am sleeping a lot better also. The gel top on this mattress is amazing as it keeps a nice cool layer even if you stay in the same spot for a long time. When summer comes I see this being a HUGE plus.Pros: Firm but giving, cooling, even firmness over the entire surface area, smell fades within daysCons: Honestly none as of yetI will update in a month or two.4 month update:Looks and feels brand new.No dents, soft/hard spots, and no signs of wear or breakdown.We live in western Pennsylvania and it has been in the 90s during the day and 68-72 at night. The beds gel layer has been a Godsend.I go to bed 2-3 hours after my wife and when I sit and then lay down she never knows.My back has been better in these last 3 months than it has been in years.1 year update:Still looks brand new.No bowing or drooping areas.Every night the wife and I get in it feels like the first night we slept on it.This mattress has literally helped me get the best sleep in the last year than I have in 20+ years of having a bad back.2 year update:Yes, still in love!Every night feels like the first night in this dream. Cooling still works fantastic, it is still the same firmness as when brand new, and it stills forms to my body perfectly. Would and will buy again!5 year update:Still like perfect. Every night is a great sleeping experience. Holding up like it is new.