Not nearly as thick rugged and durable as the one I purchased from another vendor for the same price. I'm sure I'll have to replace this at some point in the future as a result.
i have a thick plush round rug in my home office and was always getting stuck when i rolled back and was usually flipping or bunching the rug up every time i moved. buying this mat was a great solution to my problem.
This pad would probably work fine on 1/4" carpet with no padding but consider a heavier weight mat for any thicker or padded carpet. Chair wheels tend to dent the mat when used on thicker or padded carpet.