Serta SleepToGo 12" Firm Gel Memory Foam Mattress

So far has been a great mattress. It is firm but soft, almost a perfect balance. I thought it was going to be too firm when I first started sleeping on it but I was worrying for no reason because I have had the best sleep I have had in years and no longer wake up with a backache. Comes in a box and is very easy to open and get set up. It did smell a little chemically, but has since went away. We use this with an adjustable frame and they work great together.

I was considering more expensive bed-in-box mattresses (all $1000 plus online), most were hybrids, based on YouTube reviews. I opted instead for this much lower-priced memory foam. For the low price, I thought, well, if it sucks, I won't have invested too much in it. To my surprise, this is a really good mattress. I thought I wanted something really firm because I am larger and had been sleeping on an unsupported, worn out coil mattress. I was worried this would be too soft. It's not. In fact, if anything, it might just be a touch too firm. That said, it is super comfortable. Keep in mind, there will be a little bit of "sink" into the spot you are sleeping in (it is memory foam), so if you move over out of the spot, you might feel the incline a little bit. But, so far, after a couple of weeks, the sunken spot doesn't remain day to day, i.e., it seems to re-firm after getting up for the day. The sink-in does not bother me that much, but I enjoy moving out of that spot, onto a firmer unsunken spot, which is also comfortable. I think it will help also to rotate the mattress fairly regularly. As for heat retention, I had a cotton mattress cover that breathed well, and there was no heat build up. I switched to a higher quality "waterproof" mattress cover, and I noticed more heat retention than before, so I may go back to the cotton one. Its not the mattress but the mattress cover I selected. In short, for the low price I paid on sale, this is a super-comfortable, not too soft, and apparently high quality queen mattress. I have it on a very firm, metal-slatted platform, which works great (no more box springs). Are there more comfortable, more expensive mattresses? Probably, but I don't know. But spending more than $400 or $500 on a mattress seems insane to me. For the price and comfort, I am very pleased with this one (and I am often very difficult to please with these types of things).