Dear Phoenix,
Thank you very much for your reply.
I went to the Eclipse website, but of course I could not find any information about the foam densities, etc to make a judgment about the quality.
I am thinking about removing it from consideration (which I already did) unless you have some good thoughts/knowledge about it?
Regarding the sagging issue, I guess I am just paranoid given my prior experience. My BMI is closer to 25 and can be a bit higher. My last (current) mattress, the IKEA MORGEDAL firm has a layer of 1.7 lb/cu.ft form, which lower than your recommended 1.8. Although 1.8 is where you still add a caution.
Now, the IKEA mattress started sagging after only a few months (3 maybe?). I am thinking, is 1.8 that much better than 1.7 so that I can be completely at ease?
For these reasons, I tried to avoid the mattress where you “add a slight caution”.
I think my situation is very similar to this post here
and I am curious what you have to say about it too!