I agree with all of the reviews that say it just doesn’t lie flat.  I’ve had a 3x5 under a small (fairly lightweight) dinette table for a year and I am constantly putting 3 gallon water jugs on the edges in the hope of getting it to lie flat so I don’t trip over it.  I even laid it out under a big heavy carpet in another room for several weeks thinking that might permanently flatten it.  Also, no dice.  It still buckles up in ripples here and there.  That being said, I am very happy with the colors and the pattern.  And it isn’t like it was a major investment!  You get what you pay for.