I found that all the mats smelled to me, but I did a sniff test when I got them. I think they all give off a smell and how smelly they are when you get them depends on how long they have aged.
I didn't notice the smell in the store, it seemed the least smelly, but when I got home and put it in the confined space of my sewing area I did notice it. So I just put it in the garage for a while, and on a sunny day I put it on my deck, a good flat surgace. It did take a few weeks before it was totally gone, but no problem now.