so far (only a couple of weeks) we have been pleased with the quality appearance and construction. It seems to be a great value for the price. If it holds up over time we will be thrilled!
My carpet is normal pile not too high not too low. The plactic prongs on the underside of the mat do not hold it in place. Everytime I move in my chair (it has wheels) the mat moves as well until it it bunched up against the edges of the desk which keep it from moving any further. I have to remove the chair and straighten the mat a couple of times a day and the fairly thick plastic material retains the rolling bunches unless you apply heat with a hair dryer to warm it into submission so it will lay flat again. Not satisfied at all.
This mat allows my desk chair to roll easily over the thick plush carpet in the office. Should have purchased sooner. It grips the carpet and doesn't move.