Hi Wrewster,
They are very transparent about the blend of the latex they use and the density of their polyfoam layers. You can see the information about their mattresses in post #6 here and they are all high quality and durable materials and there are no weak links in their mattresses.
They are also a member of the site which means I think highly of them and that I believe they compete well with the best in the industry and transparency is one of the requirements before a manufacturer can become a member of the site.
Latex is among the most durable materials in the industry so I would certainly have no durability concerns about latex layers or latex cells.
Other than that though … while I do recommend the members here “as a group” … I don’t make specific suggestions or recommendations for either a mattress, manufacturers/retailers, or materials because only you can feel what you feel on a mattress and there are too many unknowns, variables, and personal preferences involved for anyone to know which type of mattress design or materials would be best for you based on specs (either yours or a mattress) or theory at a distance (see mattress firmness/comfort levels in post #2 here).
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 comparisons between mattresses.
They are certainly well worth considering as purchase and they have a 101 day trial period with a free return if that becomes necessary (except on the Dream Lite mattress) so you have more than enough time to decide if the mattress as you ordered it or one of the other configurations that are possible is a good “match” for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) and confirm that you are sleeping well on the mattress.
Phoenix