On Sun, 28 Dec 2014 05:14:24 +0000, gregz wrote:

I bought a Sealy at sears. Was about $600 on sale.

Was that the mattress only? Or the combination with the box spring
as shown with the prospective Costco purchase?

The problem with new mattresses is overuse of foam.

Where is the "foam"? I presume it's "under" the cloth?
What else do they use if it's not foam, for the softness?

I would never buy one without trying it out at the store.

While there's nothing wrong with taking a car or a girlfriend
out for a test drive, you never can test a mattress just by
"kicking the tires". Essentially, you can't test a mattress
for comfort, at least not realistically, without actually
sleeping in it overnight or even for a few nights.

So I'd rather stick to objectives I can "measure" with
math.