I have had this rug now for over a year.  It STILL curls up on the edges.  We have tried everything.  Big boxes of books on the corners, steaming it down, folding it under, putting it upside down for a while, Nothing Works!  Plus, it slides off of the rug pad I bought, so I'm constantly rearranging it.  The teal color dulled and there is more brown (not gray) in it than the teal which is the color I wanted.  After a year, now thinking about replacing the rug because it is getting on my nerves.