Had this mattress 4 months.  We got it for my husbands horrible stenosis, has had 2 back surgeries and a spinal stimulator implant.  Were leery about a “bed in a box” hybrid mattress.  What an amazing surprise.  No more “wrong mattress pain”.  The memory foam doesn’t wrap around you and bounces right back.  It is warmer but not hot.  Some reviews say people could feel the springs.  We do not even know there’s springs.  I think they were laying on the wrong side. It has not lost any support and no sinkage.  Best mattress I have ever owned.  And what a deal.