I will be the first to say that this is the most comfortable mattress I have ever experienced.  I have a queen size bed.  Usually me and my husband argue about whether or not to put a topper on the bed.  I got the firm mattress, and it is even soft enough for me to sleep on, while he does not complain about back issues from the mattress!  We finally found a mattress that we can both agree on, without the hefty price!