Honestly I was disappointed in the quality of the product. The chair mat is the correct size of course but the plastic itself is surprisingly thin and actually "dents" while I am sitting in my chair in my office. I am used to and was expecting a better (that is thicker) product. I actually wonder how long the mat is going to last if it is "denting" when I use it. I in good conscience wouldn't recommend the product to a friend or colleague for that reason. The delivery was on time although I did think it was unusual that for the extra $2.99 I had to pay for shipping it it just arrived at my house just as the chair mat itself (no covering no packing no nothing). It wasn't damaged at all but could have easily been in the shipping process "unprotected" This doesn't change my rating of the product - just that I was surprised how it was shipped.
This chair map works well on a thick carpet. The spikes hold it down but they are not sharp to touch. Translucent material blends well with the tan carpet and does not stand out. Overall excellent and cost effective mat.
The product is advertised for use on flat pile carpet. I have a low pile carpet - not flat enough I guess - but certainly nothing that can be described as plush; far from it. The matt quickly developed depressions where the casters on my office chair usually are making it more difficult to roll around than if the matt weren't there. This product should be limited to hardwood linoleum tile or other hard surfaces. Use on carpet only if the carpet is VERY thin.