Yes .145" of soft plastic will dent where the wheels are as common sense would dictate. I can't believe anyone would be surprised by this. I am just now having to purchase a new mat. I got SIX YEARS of heavy use out of this one on medium pile carpeting. That's well worth it in my book.
My original Staples chairmat finally gave up the ghost after 6 years so I bought the thickest one they could sell me -- even though my high-backed chair is on industrial grade (read: thin cheap) carpet. I overbought to minimize splintering due to the effects of ozone on plastic goods. I'm glad I did.[...] This mat probably weighs a good thirty-five pounds and unlike the comments by others that their mat was rolled this was perfectly flat. It doesn't bend. It can't. It's too thick.The beveled edge isn't too beveled but that's a problem with my expectations not the mat. You can't make the beveled edge too thin else it will stress and flex when the chair wheels drop off onto the carpet (that's what cracks your mat). This edge was designed to prevent that - and there's no problem transitioning my chair from mat to carpet.I'm glad I went beyond my immediate need -- choosing the extra thickness of this mat was one of the best decisions I have made. The mat doesn't bend under my weight (I'm 185 and my chair's a good 40 lbs) and I'm confident this mat will last longer than the one it replaces.[...]
We may have to return this because it affects my allergy-based asthma. The off-gassing has lasted a week and is diminished but not gone. Otherwise an adequate product.
I bought this to use under a desk. The chair that sits on top of it is very light and has hard plastic casters. It is being used by my child that weighs under 100lbs.The product has dents in the material from the chair. It is very hard to roll on top of it! I am not real pleased with this product.