Hi AJB435,
Plushbeds uses good quality materials but is not the best value IMO compared to many other options available to you. They are also nothing like the Custom Sleep Design mattresses which are custom layered and custom zoned mattresses.
A forum search on Plushbeds will bring up much more information about them but in essence they use good quality materials but are not in the same value range as the online members listed in post #21 here or even some other online merchants (in other words their prices are only good in comparison to other merchants that are more expensive yet but not so good in comparison to many others that have similar materials and designs, have a wider variety of choices and better options available, and sell for less).
Custom Sleep Design is a member here which means that I consider them to be among the best quality and value in the country. They are more costly than other more “basic” latex mattresses because they are custom zoned and layered specifically to the measurements and weight of each person on the mattress. They will also exchange layers at no cost until you are happy with the mattress. They are well worth a more extended conversation on the phone.
Hope this helps.
Phoenix