Hi bmorgan,
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 comparisons between mattresses.
What it will really come down to is …
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Suitability which is all about comfort and how well you will sleep on a mattress regardless of the materials themselves. The only way to know this with any certainty will be based on your own testing and personal experience when you sleep on the mattress. Everything else is just marketing because each person is unique in their own specific needs and preferences.
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Durability which is all about how long you will sleep well on the mattress before you need to replace it. The only way to know this is based on the quality/density and durability of the materials inside it.
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“Value” which is all about how a mattress compares to other mattresses you are considering based on #1 and #2 and all the other parts of your personal value equation that are most important to you (including the price and the return policy of course as well as all the other objective, subjective, and intangible parts of a mattress purchase)
With the density of the top layer of memory foam they would have a slight disadvantage in terms of durability although not to the point that I would call it a “weak link” in the mattress.
There is also more about gel memory foams in post #2 here and while most people wouldn’t have a temperature regulation issue with gel memory foams … the odds are higher that a minority of people will sleep warmer compared to other types of foam materials.
Again … one of the bigger issues I would have with 4sleep is not knowing anything about the company itself and who I was dealing with when the company is very new.
Phoenix