Hi Michelle Tulane,
mLily uses foams that are made by Health Care Foam* in China (the same source as BedBoss, Easy Rest, and several other memory foam mattresses) which are CertiPur certified for harmful substances and VOC’s and as long as you can confirm the quality of all the materials in the mattress from your retailer (see this article) some of their mattresses can be reasonably good quality/value options.
ADMIN NOTE: *Removed 404 link|Archived Footprint: certipur.us/pages/for-industry/find-a-foam-supplier/hk-foam/
They are also generally transparent about the quality of the foams they use so that their customers can identify any weak links and make meaningful quality and value comparisons with other mattresses (although this may vary from retailer to retailer and their willingness to call their distributor and find out the information you need).
Overall I would say these are among the “better” Chinese manufacturers although there will always be some additional uncertainty and risk involved with buying a mattress that uses Chinese foams and that may have been compressed for longer periods of time (see post #2 here post #6 here).
Outside of how suitable a mattress is in terms of PPP … any specific mattress is only as good as the quality of its construction and materials regardless of the brand so it’s important to make sure that you have a list of all the layers in your mattress that includes the thickness of all the layers and the foam density of any memory foam and polyfoam in the mattress before considering any mattress purchase (see this article).
Your retailer should be able to provide this to you and I have talked with several regional distributors for mLily that appear to be willing to provide their specs to their retailers.
Once you have the specs you need (for the mLily or any other mattress you are considering) … if you list them here I’d be happy to share my thoughts about the mattress and the materials inside it or help you identify any potential weak links it may have.
Phoenix