It is expensive. The cleats aren't nearly big enough for the thickness of carpet this is supposed to work for (3/8") so it slides around. It works otherwise with no cracking yet. It flexes a lot too so you need to rotate the wheels periodically so you don't create divots in the mat. Not sure it's worth the premium given it won't stay put and still flexes a lot.
This mat looks fine grippers on the bottom work well size is fine. BUT it’s very soft plastic so your chair wheels press into it and make it very difficult to roll or move around. It’s not at all like rolling on a hard surface floor. This is on very low berber-like carpet. Disappointed.
The mat is exactly what we needed to protect the carpet under our office chair. It is a great size good quality and stays in position. It was delivered quickly!