Hi JBR2022,
While Tempur-Pedic is a popular mattress brand, their lack of transparency on material used in the components and density of layers in their mattresses doesn’t allow for a clear idea of how much memory foam, gel foam or HD foam is inside, or in what proportion. While this mattress may be comfortable for you depending on your stats (Height, BMI, sleeping position(s) and any health conditions), I would caution on relying too heavily on reviews, as these are just the opinions of others. Your mattress is a personal choice for you, and is specific to your PPP (Posture & alignment, Pressure relief, and Personal preferences).
Any mattress with more than an inch or 2 of memory foam or polyfoam can be liable to prematurely wear and affect the sleepers’ comfort, and even cause alignment issues and undue pressure on the spine and joints. You can see the durability of specific components and materials in the mattress durability guidelines here, And different types of mattresses here. You can also see what other consumers have said about Tempur-Pedic mattresses on the forumhere
Hybrid mattresses can retain heat from the sleeper’s body temperature, or from the climate (depending on the materials in the comfort transition layers). By themselves innersprings are one of the most temperature neutral materials for a mattress. But a comfort layer with memory foam can be problematic for most when it comes to temperature regulation. Memory foam does a very good job at minimizing motions transfer, but it will generally be sleeping hot and be the least breathable and most insulating of the foam comfort materials, so temperature can be an issue and if you like memory foam you’d want to make sure that you don’t choose something with too much memory foam on top that you sink in too deeply as the more you sink into it the more will sleep hot. Any breathable layer, like soft latex or wool or another permeable material in the top layers will allow the components to breathe and help to a certain extent dissipate heat. The upper layers of a mattress are the most significant part of temperature and moisture regulation as it relates to the sleeper, the airflow and ventilation will occur from all sides of the mattress including the deeper support components. A hybrid latex mattress that is using a pocket coil core which is one of the most breathable types of cores… followed by latex which is also the most breathable and “temperature neutral” of all the different types of foam materials. Latex allows for more air flow than any other foams and when changing positions on the mattress the air will be moved in and out like within an accordion.
When you decided what type of materials you like, in your search for a new mattress make sure to look at the Mattress Shopping Tutorial and find the mattress specifications you need to know to get a better idea of what to look for and avoid in a hybrid mattress… I would avoid any mattress that does not disclose the density and amount of foam in their product.
Basilio