Usually I don’t comment for the review. But when I opened the box, there was no smell like it mentioned on the comments. And I left the mattress after I opened for three days , it was perfect size to be maximized. And this mattress is not too soft but not too firm either !!! So perfect for my lower back! And when I woke up next day, I didn’t feel any pain which I always get in the morning !!! That’s one of the best purchase !