Hi fletcher6490,
Their 10" gel memory foam mattress uses 3" of 3 lb memory foam in the top layer which is a lower quality and less durable material than I would consider and would be a weak link in the mattress (see the foam quality guidelines here). I would suggest avoiding it.
There is also 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.
Phoenix