Nice LARGE thick mat! First one came in damaged but Staples QUICKLY replaced it (2 days). Works well on short shag carpet. I'm 200 lbs and my chair rolls smoothly without sinking it. I've had cheaper thinner mats that didn't work well. I would recommend this mat to others.. Good product value.
Too flimsy; already getting wheels making indents in the mat. Nothing in material about the the mat indicated that a 50 lb chair (purchased from Staples) sat in by an average adult would create dents in the mat.