I really like my mat--I just wish it wouldn't ruin so quickly. I had a huge hole in mine (but I think that is my fault since I have to roll around it so much all day long!). LOVE IT:)
The mat is fine but it quickly shows my office chair wheel indentations. I'm not sure how you would get around this problem unless you made the product much thicker - which is not realistic. The mat "lifespan" is about 4-6 months then it starts cracking (from the weight on the indentations and 'aging)')
I bought it for our computer room but think I got the wrong thickness for the carpet in here. Our chair doesn't roll as easily as I want it to. But the mat is fine.
After 2 weeks I ended up returning this mat and getting the 130 ml thickness mat. Only 2 weeks and already there were deep wear marks from my office chair. I am a small 125 pounds so this was surprising to me. I have regular basic carpeting no fancy pile carpet or extra padding. This mat should only be used on commercial carpets with wood/concrete directly underneath. No regular carpeting for this mat as it is not strong enough. Very disappointing and definitely learned a lesson. If there is any doubt reading the description start with the more expensive product.