A decent choice if you need a mat for hardwood floors; it was hard to find one in the size I needed, but this one fits perfectly between the legs of my oversized "executive desk". I was happy to see that it was shipped flat, but there are two warps/bumps running along the center of the mat...it almost looks as if it had been draped over a set of bars or a board and stored that way for some time before shipping. The bumps have not flattened out completely with use, so I've stumbled over the edge of the mat once or twice because the edges are not completely flush with the floor. Also, the mat occasionally shifts  position (one end will start curling against the wall while the other end shifts away from it), which I think may result from my chair rolling over the bumps in the mat (I don't think it would shift as easily if the mat were completely flat). I would give this product 5 stars if the mat were completely flat, but I'm docking a star for the bend/warp and related issues.