I love it!  There was a slight odor, as stated in other reviews, but not overpowering and it went away quickly. I’m very sensitive to smells and it wasn’t bad at all. It comes with a great quality mattress cover that fits over it AND your mattress, to hold it in place.  I haven’t had a problem with the topper moving at all. It’s extremely comfortable and the perfect balance between soft and firm. I definitely recommend it!  We have a very firm mattress that used to be comfortable for me, but I had been waking up in the mornings with a sore back and sore pressure points. This topper has really helped and no more soreness.