This is the second memory foam topper I have purchased from Wayfair.  It has made my firm mattress so much softer.  I like that the gel makes the bed cooler.  I liked having the package quickly arrive at my house.  I was surprised how small the foam topper was rolled up but how it quickly expanded when opened up.  It did not give off any odour that I could detect.  I am extremely happy with my purchase and highly recommend it!!!