This works for me and I used it 4 hours after taking it out of the box,seemed fully expanded and really helped my sleep. I do think it's a little weird that there's no information whatsoever about this topper inside the box I was glad this was my second mattress top purchase. I did go over it well with a lint roller on both sides before I put my mattress pad on it and my mattress. I would say it is worth the money but we'll see, my old one lasted 3 years.