I was a little nervous when the box arrived and I could barely pick it up....this is a very thick pillow top!!  Aired it out for a couple of days, no smell.  Put my mattress cover over the top so it has not shifted.  Someone else said it was sleeping on a cloud and I have to agree.  Doesn't hold any heat, extremely soft and comfortable.  Just one more excuse not to get out of bed in the morning!!  Very happy with this purchase.