Omg. Literally saved my back and hips (I’m a side sleeper and I’m old so everything hurts lol) from the tossing and turning I was doing. Love my firm mattress but I needed a little extra padding and this is AWESOME. I fluff it and flip it around every time I change my sheets so it stays nice and soft and I’ve had no issues. It doesn’t attach to the 
mattress but stays right in place. 100 would buy again.