I received this bed two weeks ago and set it up right away.  I allowed it to expand for 4-5 hours, measuring it periodically.  At hour 5, it was about 13 inches thick.  I was dreading the new foam mattress smell, but it never happened.  What a surprise, since all the other mattresses I've bought have off-gassed for a couple of days.   This mattress is not super plush; it is semi-firm with a plush surface.  It is very comfortable.  All I want to do is get in bed now.  It's my very favorite possession.  Buy it, and you will not regret the purchase.