I use this under my birdcage and while it is very easy to clean the plastic indented underneath the legs of the cage. I was hoping with the thickness advertised it would not warp. I would not recommend this product for someone who is heavier.
Bought two of these. The one for my office is great. We have "commercial" grade carpet on cement flooring. No problem. However for my home office...on friese carpet with pad...the material is so soft and flimsy that the casters on my chair keep mashing down into it...and are a pain to roll out of those depressions.
I was concerned when I got this. I'm used to very stiff mats over this heavy carpet. It seemed like the wheels were sinking into the mat but it works great! Chair rolls easily and it's more comfortable.