It looks good but it is "too thin" to hold the body weight and chair weight. It should be thicker. Now I see why it was the lowest price. (It's my first). It actually makes small indentions (sink-holes) impressions in the mat itself (somewhat) preventing you from rolling your chair. But they do go away after a minute or two. This mat will do for now but I will need to replace it with a more expensive one that the chair will not sink down into. You can't exactly see the "sink-hole " but it is about 1/2 inch deep. The Chair Mat "is" there. The metal ruler is flat across the mat and yet the thick wooden ruler can fit under it - down in the sink hole. Conclusion... The one made for Hardwood floors may work fine but the one (I have) for thick carpet is too soft.
Not quite as sturdy as I hoped. Plastic sinks into carpet where you sit on the chair. Leaving divots in the mat. Every time you roll you have to roll across them.
I am very pleased with this chair mat which makes my drafting chair so much easier to move. Compared to the offerings at my local office supply stores this mat has a better shape (rectangle) larger size and came at half the cost. I am about 220 lbs and do notice wheel indentations in the mat after I've sat in one place for awhile but those indentations disappear over the next few hours (and I recognize that this is made of plastic not granite). It is so much easier to move my chair now than when it was resting straight on the berber carpet. At this pricepoint I recommend.