I would caution anyone contemplating purchasing a foam mattress via the web. Not that I'm against on line purchases, but look at the return policy closely.
Many companies state that a returned mattress must be packaged in the original container....an impossible task once the foam expands.
Look at
Sleep Like The Dead web site for reviews. We did our comparisons there, and ended up with a 14" memory foam from Costco to replace our pillow top....they have a great return policy, and shipped it to us.
And if
Made in America is important to you, check here also.
Regards
Gemstone