I bought this to help my aching knees from constantly trying to push myself around on carpet and it doesn't appear that it will help much. Rolling around on it takes almost as much effort as it does on the thin carpeting we have. It arrived in a roll and when trying to remove the tape holding it together it left behind a lot of the gum - so now my feet stick to it. Definitely not happy with it.
Purchased this chairmat to replace a perfectly good one which I had but chair rollers dented (settled into) the mat making rolling difficult. The replacement which I paid two and half times more for offered not better support for the chair wheels on the same carpet. The carpet is a dense weave and should have been o.k. for the "plush" model chairmat.
While I have a different Staples mat at my computer I purchased this one for use at my sewing desk. As the item description says it works best on an unpadded commercial carpet. While it is a little light weight for where I have it it is providing adequate protection for my carpet.
I will use this mat a lot. It is a replacement and will be used at my computer desk and I spend several hours there every day. The mat makes it easier for me to move my chair. At 75 I am not as agile as I once was and I need all the help I can get. This mat does not seem to be quite as large or as good a quality as the first one and of course the price had more than doubled. Signs of the times.