This is the absolute worst mattress I have ever slept on.  The Serta Pillow Top mattress was boasted to give you a Great night's sleep. 

I have a sink hole on each side and a mountain peak in the center of my Serta Pillow Top mattress.  This is our second mattress, the same thing happened to a previous Serta Pillow Top mattress and with much protest the company replaced it with an identical Mattress.  the company would not replace the second one.

I'll not purchase a Serta Product again.