I've used it for about a month now, maybe longer, and it hasn't slipped out of place, hasn't needed to be pulled back over the corners, not once. Also, it isn't noticeable through my sheet, it doesn't feel like I'm sleeping on anything extra.
I was worried that putting this thing on my deliciously soft GhostBed was going to make it feel like I was sleeping on a diaper pad. After fitting it over the mattress and laying down on my sheets I could barely tell the difference. The bed retains its nice cool feel, and even when I slide my legs back and forth the mattress protector doesn't bunch up underneath the sheets. Very good product.
Our new ghostbed let us sleep much better at night. No more hours of tossing and turning trying to get comfortable. And if we wake up we go right back to sleep. It’s amazing.
This is a fantastic mattress that lives up to the description. I will say, that I was on a very old mattress prior to this so while it wasn’t good for my back, my body was used to it. It has taken some adjusting to the new (better) surface. I will say give it time if you get one and don’t love it first night... mattresses do “settle”.