We sunk into our old mattress! Yes, our 2 kids sleep with us! They would roll in the hole with us. NOT ANY MORE!!! Now they stay in the middle where they belong. There is also no mattress movement when someone shifts or gets in/out of the bed.
We got 3 free ghost pillows as part of a promo when we purchase our Ghost Bed. Pillows like this are not the type of thing we usually spend money on, but we will now. We have fallen in love with our Ghost pillows. We have found that they are good for both back and side sleeping. Only time will tell how long they hold up, but for now we are super satisfied and will very likely consider purchasing a new ones when they eventually bite the dust.
When we first got this pillow we were really worried just based on the size as we were used to king size pillows. As soon as I slept on this pillow all of those worries went away. It stays cool, its easy to sleep on in all positions and stays in place. I tell everyone about this pillow now!