We let this topper air out for 5 days, and it still has some residual odor. I wish I had someplace outdoors where I could let it air out for a few weeks - I think it would make a big difference. It STINKS. What other reviewers said about the height is true - it is only 3" at the top of the peaks, but it is absolutely heavenly to sleep on. It's cushy, but not too cushy. It is a wonderful topper for a really great price. I'd recommend it for sure, but I would make sure they knew it REALLY needs to air out!