Product does not stay in one place atop the carpet and keeps sliding around. Thought the bottom plastic protrusions with the weight of the chair would be enough to keep the flat chair pile carpet chair mat in one place. Maybe the protrusions need to be a little bit longer on the underside. I did not have the same problem with the previous product that I purchased at the same store. Hoping the plastic protrusions on the mat underside did not get smaller since I purchased the last product.
The smooth nub design on the bottom is safer than the pointy nubs but they allow the mat to move around more on carpet requiring frequent repositioning.
When the product came rolled up I was fairly sure there would be an issue. After 5 minutes on the chair mat I had to bump the chair out of the sunken castor ruts. Way too thin for carpet applications ie. CHEAP