I am using this mat on a carpet that is minimal and installed over concrete. It still gives under the rollers. It is just not heavy enough to be used as a floor mat. I bought this because of its size but I am better off not using it. I would not even recommend this mat to an enemy let alone a friend. Do not buy this mat!
After less than a year this mat started cracking and only got worse. I patched it with clear duct tape which helped for awhile. I know it isn't the top of the line but I was hoping by paying a little more that it would last at least a few years but that was not my experience.