It's not a super high end, space foam, also makes you breakfast in the morning kind of mattress, but it does the trick.  We bought it for the 'convenience factor' of having a well-priced mattress delivered to our house and wha-da-ya-know... perfect.  I don't think it's a 15 year mattress, but certainly a 5 year.  For that price and convenience, I'll take it!