Hi Taooliver,
Post #2 here should be helpful. A forum search on mlily (you can just click this) will also bring up more information about them.
Knowing the quality and value of any specific mattress though would depend on your ability to find out the more detailed specs of all the layers in the mattress (including the memory foam and polyfoam densities of all the layers) because regardless of who makes it … a specific mattress is only as good as the construction and materials that are in it.
Phoenix