Hi spaztazman,
Their latex mattresses use high quality materials and there are no weak links in either of them. OMF is also a reputable manufacturer that makes some good quality/value mattresses which is why I include them in the local forum lists for the better options or possibilities in any of the areas where they have a store. There is more about their Serenity and Serenity Plush latex hybrid mattresses in post #14 here and the posts it links to (ADDED: I linked to more information about their Serenity memory foam mattress by mistake … if you scroll down to post #4 in this topic there is more about their Serenity latex).
Phoenix