I am so happy I bought these. I read the reviews and I felt encouraged to buy. My children were having a lot of interruptions in their sleep then I realized that the mattress were very uncomfortable. Since I bought these they sleep through the entire night. I did not experience any odor from these toppers at all and they eventually opened up completely but are probably just an inch or two shorter than the actual mattress...which is a non-issue really. Happy happy !! Thank you wayfair.