We have only had the mattress for one night of slumber but it is already the best nights rest I have had in months!!!  Not ONCE did I wake up!  Normally between my husband and me we are up a total of 3 times or more.  He gets up, wakes me up, then I get up.  I did not wake up one time throughout the night!  Hallelujah!  Hopefully this will be ongoing for many more years of use!