I read all the reviews before making this purchase.  I have a 12" memory foam on my bed at home but this purchase was for a vacation rental property.  My mattress cost three times as much.  And guess what?  This mattress is almost identical to mine.  Even the cover is very similar.
I don't understand the people that said it did not take shape as it should.  I had to have the mattress delivered to my home, then hire someone to take it to the vacation property.  It sat, in the box, on my front deck - in the sun - for 3 days.  Yet when we opened it, it was in full perfect shape IMMEDIATELY.  There was no 48 hour delay, there was no discernible odor.  It was just immediately perfect.  
There is simply no way you can beat this mattress anywhere near this price.