I purchased the mat to replace my prior mat that I had for five years. The older mat required replacement due to breaking and chipping due to wear and tear. This mat appears to be more malleable than the prior mat and may hold up longer than the prior mat. If you sit in one spot for two long the mat will develop dents where the casters are. However it appears that when you move the chair away the dents do go away as a result of the malleable material. I have seen no issues with moving my chair around on the mat. I have currently had the mat for about one month.
The mat was not thick enough. It would roll back to the previous spot because it left indentations. I've been using a piece of ply-wood for years and thought I'd try the mat. I'm back to the ply-wood.
Not very thick and it slides around on the carpet easily. If someone is standing on it the edges curl up and are a tripping hazard. That being said it allows my chair to move around on the carpet which is what it is supposed to do and what I needed it for.