I would've gone for the more heavy duty chair mat but I didn't want to pay over $70 bucks for one so I opted for this one. It gets the job done as far as protecting your carpet. However if you plan on being at our desk quite a bit I would go for the heavy duty ones. After sitting in the chair for 5 minutes the wheels of the chair start to make an indention which prevents smooth rolling. You kind of have to sit up a bit just to move the chair. It doesn't do what I purchased it for which was to be able to roll around with ease however it does stay in place when you actually are trying to force your chair to move. I'm only 4'11" and the indention into the mat from my small frame is annoying enough. Imagine what it would be like for someone who weighs more than me. And my carpet really doesn't need protecting since I'm changing it anyways...
Used in home office with minimal thickness w/padding. Have not found anything great about it except the price. I believe a piece if 1/4" plywood with carpet tacks in it would work better. It won't lay flat shifts position does not support my 200 lb. self and office chair.