Hi kgoody,
I don’t know all the specs of the materials in the IM Perfect for certain but the Talalay latex in the comfort layer is a high quality and very durable material and I believe that the polyfoam they used was 1.8 lbs which is also a good quality material so if this was accurate then there would be no obvious weak links in the mattress. It’s very easy to rewrap a returned mattress in plastic and this is a very common practice so the fact that a mattress is wrapped in plastic really doesn’t mean anything.
I don’t have any personal experience with either mattress but with any mattress … regardless of the name of the manufacturer … once you know the type and quality of the materials (see this article) then you can identify whether there are any weak links in the mattress in terms of durability and make more meaningful comparisons to other mattresses. Any good retailer should be able to provide these for you.
Golden Mattress typically uses higher quality materials and make mattresses that are better quality/value than most larger mainstream manufacturers (they often use 2 lb polyfoam in their base layers for example which is a high quality material) but I would always make sure you know the current specs for the type and quality of all the materials in any mattress you are considering.
You can see my thoughts about Diamond in post #2 here and in post #2 here. Again … if you are considering a specific Diamond mattress then I would always make sure that the retailer can provide you you with all the information you need to make an informed choice as well.
If you can provide the current specs for any of these mattresses and post them on the forum I’d be happy to make some comments about the quality of the materials inside them.
Unfortunately the last time I heard from them was the conversation that I mentioned in post #5 here.
Phoenix