My best sleep in years!  I put my older tempurpedic mattress on this base and it feels like new again.  Easily assembled in half hour.  The massage is purrfect  my poor old tense body melted, painfree and relaxed. The different modes are great too!  I am finally sleeping with my head raised, a position that allows me to breath9e as I suffer from advanced COPD.  The elevated legs position helps my neuropathy and edema.
I am writing this after a week of use and will update later to give feedback if my opinion changes.