Kind of peripherally related, and I assume anyone with a keen interest in mattresses will find themselves here so I hope it's not that much of a stretch, if you're looking for a mattress consider the Sleep Master iCoil line available from Amazon.com:
Amazon.com - Sleep Master iCoil 13 Inch Euro Top Spring Mattress and BiFold Box Spring Set, Full - Queen Mattress And Box Spring Set
We needed a mattress and box spring for the guest bedroom so we ordered these and I'm really pleasantly surprised with how firm, comfortable, and apparently sturdy it is.
For $475 ($531 if you need a frame too, we didn't so I can't comment on that end of things) shipped to your door for free you really can't go wrong.
I was initially astonished that they were able to fit a queen size mattress in a 3'x3'x4' box (aprox.), but it comes jam packed into a woven plastic bag and when you cut it out of the bag thing expands in an amazing fashion.
It went from a rolled up "something" to a queen size mattress before my eyes in under a minute.
It was funny because I didn't know what to expect so I didn't really "clear the area" before unpacking and when I cut the bag and this thing started growing I was rushing like hell to clear breakables off the dresser, shoo the dog out of the room, chase the kids out of the way, and try to "guide" the thing in to the general area where I wanted it. And it has all the weight and heft of a queen size mattress behind it so, basically, look the **** out.
I haven't slept on it for any length of time (I took a nap on it one afternoon over the holidays) and it was incredibly comfortable.
I sleep, ordinarily, on a $3000 mattress and this thing gives it a run for it's money.
My in-laws (in their 80s, so a comfortable mattress is important to them) are spending some time with us and they love the thing.
It also comes in a king size (for $499) which might be just the ticket for someone who lives in tight quarters (like a four story walk up with narrow stairwells) and can't get a normal queen or king size mattress and box spring up the steps.
The box spring is a two-piece so that's pretty easy to navigate around too.
Really a great product for the money, and even if it doesn't stand up to nightly use for a long period of time for $450 you can afford to replace it every couple of years without hurting too badly.