There is no odor with this mat and the corners lay down flat (there is no curling up of the corners).My only grief with

No divots from the pressure of the chair with me in it for hours every day, no curled edges, no issues whatsoever

You certainly don't need to worry about this product being curled or losing its shape.

Been using this under a small dining table to save new carpeting from spills - working out very well, no curling, no cracking, no problems