I bought this to replace another mat which after 10 years had cracked enough to be coming apart. But this one has the same sag where the wheels are and holds those sags even though it was designed for 3/8" berber carpet. I suspect it will fail quickly and until then I'll need to "work" to move my chair from wheel sag divot to wheel sag divot. But it does protect the carpet!
This is my second purchase after about 2 months after my first purchase. I just regret that I didn't buy two this time. I will wait for next sale or coupon to buy another one. This is a "made in USA" product. This product make be believe that US is still capable to be competitive in plastic product if the manufacturer and distributor do get too greedy like the Wall Street people. Viva Staple!
I use this mat for a home office with carpet. It is extremely thin which lets the chair sink into the mat causing ruts. The chair will not easily roll. I wish I had bought a thicker one.