Hi Dasupertech,
There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful quality/value comparisons between mattresses.
I would make sure that you find out the quality/density of the polyfoam layers in this mattress especially the two 1.5" convoluted layers of “comfort foam” (which is polyfoam) in their description here to make sure that they meet the quality/durability guidelines here and you are confident that they won’t become a weak link in the mattress which can lead to premature foam softening and the loss of the comfort/support that was the reason you purchased it much too quickly after a purchase. I would also make sure that if you haven’t tested the mattress in person that you are comfortable with the return/exchange policy and any costs involved so that you have good options available after a purchase just in case the mattress isn’t as good a match for you in terms of PPP as you hoped for and you don’t sleep well on the mattress.
As you can see in the comments in post #3 here about many of the “one choice fits all” mattresses … the Brooklyn Bedding #BestMattressEver uses high quality materials and there are no lower quality materials or weak links in the mattress and they have a great return policy so there is no risk in trying it outside of the time involved in testing it or returning it if it becomes necessary. If you are uncertain about which firmness level would be best for you then they can also give you some guidance if you talk with them on the phone.
This is also a great quality/value choice and there are no lower quality materials or weak links in this mattress either. It also has the advantage of being able to rearrange the layers in 12 different ways to fine tune the comfort and support of the mattress after a purchase so the odds are much smaller that you would need to return it. In a king size you can also order split layers so you can configure a different firmness level on each side of the mattress and you can also order the mattress without the soft layer if you know you prefer firmer mattresses but if all else fails and none of the 12 different comfort/support options works for you and you do need to return it then the cost would be $99 which of course is more than the Brooklyn Bedding #BestMattressEver.
I would be a little cautious here because the two 1.5" 3 lb memory foam layers are lower density than I would be comfortable with and could be a weak link in this mattress. I would also make sure you read post #6 here about mattresses that are made in China so you are comfortable with the additional uncertainty that can be involved with longer periods of compression during shipping and storage.
You can read more about the Tuft and Needle mattress in post #3 here as well and it also uses high quality materials and there are no lower quality materials or weak links in their mattress either and it also has a great return policy that would eliminate the risk of trying it as well outside of the time you spent trying it or returning it if that becomes necessary.
Comfort layers with latex will generally tend to sleep cooler than memory foam or gel memory foam comfort layers and firmer mattresses will also tend to sleep cooler than softer mattresses. A mattress that sleeps warm for some people may also be well inside a comfortable temperature range for others depending on where they are in the “oven to iceberg” range and on the temperature and humidity in their bedroom and the mattress protector or any mattress pad you are using, your sheets and bedding, and your bedclothes, which can all have a significant effect on sleeping temperature regardless of your mattress and in some cases changing these may be all that is necessary to keep sleeping temperatures inside the range that you are comfortable with even if one mattress tends to sleep warmer than another. There is also more about the many variables that can affect sleeping temperature in post #2 here that can help you choose a choose the combination of materials and components and the types of mattresses that will have the best chance of keeping you in a temperature range that you are comfortable with.
Phoenix