After several months now i am changing my review.  This power base is falling apart.  The welds are breaking causing sharp pieces of metal to rip through the bottom of my mattress creating large holes.  I would never recommend anyone buy this.  My mattress bottom is topped to shreds as there is nothing to hold it in place therefore mattress slides from side to side pulling off fixed sheet and ripping through the mattress.  My mattress was s brand new ghost and now is ruined.