We bought three different sizes of this rug.  We love the rich colors and the thickness of these rugs.  The largest rug we bought does have a smell that we can't really identify.  We only smell it when we are sitting on it.  We probably should have sent it back and had a different one sent to us.  We didn't do so because it is so big and would have been a lot of work and expensive to do so.  So instead we used some carpet odor block.  Which has helped.  The other two rugs smell fine.